Elsa filled them in on the whole events that occurred recently with some sort of Enchanted Forest in Arendelle, a voice in her head, how she met Bruni, the Fire spirit and that the water spirit is what got her to the Edge after the invasion of the Hunters and the capturing of Anna, Olaf, Kristoff and Sven.

"Look, guys, we only have one chance of knocking out his fleet and saving the citizens of Arendelle. We don't know why Viggo is there, but we need to do it right." Hiccup tells the team after a failed trial run.

After the day was over, Hiccup returned to his hut where Elsa meets up with him.

"Hey, Hiccup, I just wanted to say thanks again for your help." Elsa tells him.

"Hey, we're friends. What else are friends for?" Hiccup says as he yawns from the training. "I'm gonna go get some shut eye before dinner." He tells her and opens his hut to see Dagur is inside and is holding Inferno.

"This is cool." Dagur comments about the sword.

Elsa and Hiccup screams in surprise of seeing him.

"Hiccup! And the ice queen." Dagur greets since he never got Elsa's name. "It's just me." He says while waving inferno around. "Oh. Sorry. How do you turn this thing off?" He asks and Elsa shoots some ice at it.

"Isn't he the guy who killed Heather's family and tried to kill you guys?" Elsa asks Hiccup with a hand raised to stop him.

"Yeah...he's actually Heather's brother." Hiccup informs her.

Elsa looks surprised and looks to Hiccup surprised. "I see I missed some things as well."

"And done worry, I think we're safe." Hiccup assures her and she lowers her hand.

"So I never did catch your name?" Dagur tells Elsa.

"It's Elsa. And I already know you're Dagur." Elsa replies to him.

"And give me that." Hiccup tells Dagur, snatching Inferno.

"I see you've been keeping busy." Dagur says as Toothless growls at him. "Hey, come on, Toothless. Where's the love, man?"

"Dagur, What in the Thor are you doing here?" Hiccup asks him as he places Inferno down.

"Heather. I thought I'd find her here, and I haven't seen a trace of her. It's so...frustrating." Dagur explains.

Hiccup remembered he never actually filled in Heather and saw if she was okay so he comes with a quick lie. "Yeah, Heather hasn't actually been around here in a while, I'm afraid."

"Yeah, I kinda figured, I was waiting for you to talk to you about helping he train a dragon." Dagur explains.

"What?" Hiccup asks.

"I need to cover more ground faster. Dragony fast." Dagur explains.

"Yeah, I don't think so." Hiccup tells him.

"Hiccup! You and Toothless owe me. I saved your lives." Dagur reminds him.

"You also tried to end them twice." Hiccup reminds him.

"Did I really?" Dagur asks him. "I think maybe in here, I never really wanted to." He dats patting his chest.

"Oh, gods." Hiccup mumbles. "I can't train you to ride a dragon, especially now. Elsa has a problem we're trying to help her out with."

"Oh, you're too busy, I get it." Dagur understands. "Guess I'll be going. First maybe I'll, you know, take a stroll around the base. See a few old friends. Make a few apologies." He says and Hiccup quickly stops him.

"No, no, no. You can't." Hiccup tells him.

"Why not?" Dagur asks.

"Because...you've got to be up early tomorrow to start your training." Hiccup gives in.

"Are you serious? But I though-"

"Look, we'll meet first thing in the morning on the far side of the island. That's where most of the wild dragons are. Actually, you should go there right now and camp out for the night." Hiccup tells him.

"Great idea." Dagur says and pulls him into a hug. "Thank you, Hiccup."

"Don't mention it."

"You're so small and cuddly." Dagur tells him as Hiccup breaks off of him.

"Please never say that again. So, I'll see you later. Remember, far side of the island." Hiccup tells him as he leaves.

"What was that about?" Elsa asks him.

"Heather learned he's her brother, but she still wants to rip him apart last I remember. But he did save my life so I guess I kinda do owe him that." Hiccup admits.

"You are gonna tell her he's here or at least him she's here, right?" Elsa questions.

"Uh...I'll try to tell her as gently as possible." Hiccup promises as he gets ready to meet with everyone for dinner as Toothless and Bruni Just end up playing together.

-

"But somebody better explain how yak stew got in my pants." Tuffnut says, finishing a story as everyone laughs as Hiccup and Elsa join them as Toothless heads over and lays near Windshear and Bruni lays on top of Toothless' head and gets himself comfortable.

"Hey, speaking of soggy pants, you ever wonder what happened to Dagur and his crazy pants?" Hiccup asks and everyone stops laughing.

"No." Snotlout admits.

"And for the record, I don't think his pants were that crazy." Ruffnut tells him as a Night Terror steals Snotlout's food.

"What brings Dagur up, anyway?" Fishlegs asks.

"Nothing. But since we're on the subject of Dagur now, do you wonder why he helped Heather escape form Viggo?" Hiccup asks and looks to Heather to see her reaction.

"Probably as a distraction so he could get away himself." Astrid guesses.

"Maybe. I don't know. But what if it was actually the first step on a path towards a new life?" Hiccup asks.

"A new life? Dagur?" Heather asks as she stands up in anger. "A dragon doesn't change its markings, Hiccup."

"Uh, Technically..." Fishlegs was going to correct her.

"Except for a Changewing, yes I know." Heather corrects herself.

"And a..." Fishlegs was gonna mention but Heather interrupts again.

"You get the point!' Heather states.

"Right. You're probably right. But then again...who would have thought my father, Stoick the Vast, would ever learn to ride a dragon? Especially since I left so he wouldn't kill my dragon." Hiccup replies to her. "You never know, next time we see Dagur-"

"I'll split the father-Killer in two!" Heather promises as she uses her ax to break Hiccup's stool next to her and everyone looks surprised, and now Elsa understands what Hiccup was talking about.

"Yep. Okay, I think we get your point." Hiccup assures her, to calm her down.

"I better go. I have island patrol tonight." Heather tells them.

"Actually, I'll take the shift." Hiccup tells her. "I have a mission for you. One final recon mission to check out on Arendelle. You and Snotlout."

"What are you talking about? We went last time." Snotlout reminds him.

"I know. That's why I'm sending you again. To be on the lookout for any last minute changes." Hiccup explains.

"That sorta makes sense." Heather guesses but knows that Hiccup is hiding something.

"And you should leave tonight." Hiccup tells them.

"Tonight? But I haven't even packed." Snotlout states. "It's gonna take a whole day to get there."

"Jeez, Hiccup, you trying to get rid of us?" Heather asks, jokingly.

"Yes..no! That's crazy." Hiccup says and starts stuttering on his words.

"I'm kidding, Hiccup. Relax." Heather assures him and pecks his cheek. "Come on, Snotlout. Sooner we leave, the sooner we get back." She says and call's her dragon as they leave.

"Take your time. And by that, I mean be safe." Hiccup tells them and knows his work is cut out for him.

-

The next morning, Hiccup travels to the far side of the island to meet up with Dagur.

"Finally!" Dagur yells as he and Toothless comes flying in. "Not mad, just excited."

"Yeah, I see that." Hiccup says, knowing he needs to get Dagur out of here before Heather returns or it's gonna get messy.

"I've been thinking about what dragon I should ride. Something that makes a statement. You don't have any Skrills hanging around, do you?" Dagur asks.

"What? No." Hiccup tells him.

"Well, I suppose I could settle for a Night Fury." Dagur says looking to Toothless. "Not the same zhush as a Skrill, but I could get by."

"Sorry, he's one of a kind as far as we know." Hiccup admits.

"How about a Razorwhip like Heather's?" Dagur asks.

"Dagur, I already picked out a dragon for you." Hiccup says and whistles into the woods as something responds to the whistle and heads towards them.

"He's awesome, right? And dangerous? Because I already picked out a name. Shattermaster." Dagur says when one of the green Groncle's Hiccup and Heather rescued comes out od the woods.

"What's this? My dragon's breakfast?" Dagur asks.

"Nope. This is Shattermaster." Hiccup breaks to him. "The perfect dragon for you. Stable, easy to ride."

"Yeah, I am not riding that dragon." Dagur informs him.

"Then you're not riding any dragon." Hiccup tells him.

"It's beneath me." Dagur says while crossing his hands and looking away from the Groncle.

"Not yet, prove to me that you can even get on it." Hiccup dares of him.

"Easy." Dagur says and leaps to get on his back only for the Groncle to move back and Dagur lands on the ground and chases the dragon. "I got this! Get back here!"

"Dagur, no!" Hiccup warns him when Dagur tries to get on him from behind only to get whacked by his tail and thrown off the cliff.

"Are you Okay?" Hiccup asks and looks to see him dangling off a branch.

"I see dragon training is going well." Elsa comments as she caught up with them.

"You made your point, Hiccup. Well so it your way." Dagur promises.

-

With time, Hiccup teaches him how to do the hand-to-snout gesture to gain his trust and how to get them off the ground.

Hiccup then teaches them simple maneuvering skills through the trees.

"You're trying to steer him too much. You need to trust your dragon, Dagur." Hiccup tells him. "He doesn't want to hit the trees anymore than you do."

"If you say so." Dagur says. "Let's see wha you've got for speed, Shattermaster." He says and they speed up.

"Slow down, you're not ready for-" Hiccup was warning him when they bounce off a tree and hit Toothless.

The two get back up and so do the dragons.

"Bad Dagur, bad!" Dagur tells himself. "I'm sorry, Hiccup."

"You're trying to do too much too soon." Hiccup says and sees his foot is broken. "Great. I can't fly Toothless like this."

Dagur takes it and tries straitening it only to break it.

"It's okay. I have a spare back at my hut." Hiccup assures him. "I'll take your dragon and Elsa and be back as soon as I can." He says as Elsa helps him stand and they both get on to Shattermaster. "Now you two stay right here. Dot go anywhere. Don't do anything." He warns them as they leave.

Dagur looks to Toothless with a smug smile on his face. "So, any ideas on how to pass the time?" He asks the dragon who giggles in response.

Dagur learns how to operate Toothless' tail and starts to fly him through the air.

"Come on, T. Whoa!" Dagur says a sthey fly through the forest. "We're best friends now!" He cheers when he accidentally touches Toothless' soft spot that causes him to spread his wings out and sends Dagur flying off the saddle.

"Why'd you do me like that, bud?" Dagur asks and gets met by a ax and turns to see Astrid and the others holding Hiccup's broken leg.

"What have you done with Hiccup?" Fishlegs asks him.

-

They bring him back to the Edge with his hands tied behind his back.

"The sooner you tell us where Hiccup and Elsa are, the easier it'll go on you." Astrid tells him.

"I'm telling you, they're here. Getting Hiccup's spare leg." Dagur tells them.

"Sure he is." Tuffnut says sarcastically. "I've had enough of these lies. Either you start singing like a canary or we do." He warns him as he and Ruffnut start singing horribly as Elsa and Hiccup approaches them.

"And it only gets worse. Ask Hiccup." Tuffnut says and then realizes what he said and turns to see the two of them. "You're alive! Wait. You're alive?"

Astrid moves past Dagur and towards Hiccup. "What's going on here? Dagur says you're buddies now and you're teaching him to ride a dragon." She tells Hiccup who laughs nervously.

"Yeah, it's a funny story. Actually." Hiccup says.

They go to one of the main huts to tell them what happened and explains what happened .

"So, Dagur saves your life?" Astrid asks.

"And Toothless'. Right, bud?" Dagur adds and Toothless just walks off.

"Yeah, pretty much." Hiccup says.

"Why didn't you tell us?" Astrid asks.

"Because I wasn't sure how you would feel about it. 'Cause I wasn't sure how I felt about it." Hiccup admits.

"To be fair, I have done some pretty questionable things." Dagur admits.

"Questionable? Trying to kill us isn't questionable." Fishlegs tells him.

"Yeah, Yeah. He saved you. I get that. But why teach him to ride a dragon?" Tuffnut asks.

"He's looking for Heather." Elsa tells them.

"And the sooner I teach him how to fly, the sooner he can leave to find her. Wherever she is." Hiccup finishes.

"Dagur, have we got some good news for you." Ruffnut says, not getting the cover story.

"Yes, because Fishlegs is the best Groncle trainer in the world. He can help improve your flying." Hiccup interrupts the twins.

"Aww. Thanks, Hiccup." Fishlegs replies as the twins try getting his attention.

"Maybe you should go train him. Now." Hiccup tells Fishlegs.

"Oh, yes. Right away." Fishlegs replies and the two start leaving.

"I want to know everything. Everything!" Dagur tells Fishlegs as they leave.

-

Hiccup and Astrid are working on their plan to get the Dragon Hunters out of Arendelle and save everyone l

"Eight ships all packed together in their fiord. If we hit them with one coordinated strike, we could get the Hunters to leave Arendelle." Hiccup tells Astrid.

"Could we talk about the Rumblehorn in the room, please? Dagur here?" Astrid asks of him.

"I know. I know. But he seems like he's really trying to change." Hiccup tells her.

"You don't think is strange that he shows up here right as we're about to save Arendelle?" Astrid asks.

"You weren't there, Astrid. He could have turned us over to Viggo's men, but he helped us escape." Hiccup tells her.

"Did he? Or is that what they wanted you to think, so they could put a spy among us?" She asks.

"Look, I'm not blind to the risks, Astrid. Why do you think I have him slowest, least dangerous dragon I could find? It's...when the chips were down and I thought the hunters had me for sure,Toothless let Dagur ride him to save me. If Toothless trusts him, then I have to try to trust him, too." Hiccup explains to her.

"Well...I hope you had Toothless Are right about Dagur. For all our sakes." Astrid says.

"Maybe we should go check on him. See how he and Fishlegs are doing." Hiccup says.

"Okay, but just to be safe." Astrid says before putting a drape over the plan as they leave.

-

"Fishlegs, hows your stident?" Hiccup asks as he and Astrid fly up to meet them.

Dagur comes flying past them while laughing maniacally and returns to them.

"He is a fast learner." Fishlegs admits.

"I had an excellent teacher!" Dagur tells him.

"Oh, stop it, you." Fishlegs says, blushing. "Look at this move he came up with. Remember the Gronckle Drop?" He and Dagur go up and turn their dragons upside down and plumit before gliding over the water.

"That was insane." Hiccup tells them.

"I know! We call it the inverted Gronckle drop. We could really use it on our next mission." Fishlegs says and Hiccup nods his head, big wanting Dagur to know their plan.

"I think that's enough training for you two." Hiccup says.

"But there's hours of light left, and I have so much to learn!" Dagur states.

"On, you're still training. With me." Astrid tells him.

"He is?" Hiccup asks, not remembering that.

"Relax, Hiccup. She obviously doesn't test me and wants to check me out for herself." Dagur assures him.

"Oh, he's not as dumb a she looks." Astrid mocks.

Dagur looks at her and laughs. "And now she's trying to provoke me." He then laughs. "But it won't work. "I am the sea, calm and wide. My sense of peace comes from the inside."

"Seriously?" Astrid asks as Hiccup gets ready to fly away.

"Try not to hurt him." Hiccup asks of her as he leaves.

"No promises." Astrid replies and Dagur smiles nervously.

-

The two of them trained for the rest of the day and the twins were talking to Dagur and Chicken.

"Are you going to tell Dagur about Heather?" Astrid asks Hiccup.

"How can I? You heard her last night." Hiccup reminds her. "She clearly isn't ready to see him."

"Then I think you should get him off the edge, fast." Elsa reminds him.

"Yes, I know, why do you think I'm trying to teach him how to fly? I figured we've got until sundown tomorrow to get him out of here before they return." Hiccup says.

"Before who returns?" Heather asks and they see they've returned already.

"We raced back." Snotlout tells them.

"I think I know who lost." Hiccup says as Heather spots Dagur.

"This is not gonna go well." Elsa can see.

"You!" Heather calls out.

"Sister!" Dagur says cheerfully and stands to face her when Heather grabs her ax and runs to him in anger and Tuffnut covered Chicken's eyes.

Heather goes in and almost hits him in the face and stops herself.

"I guess a hug is out of the question?" Dagur says when Heather just punches him square jawed in the face.

Later, Hiccup got Heather and Dagur on opposite sides of the fire pit to talk and avoid a fight.

"Hiccup Haddock, I cannot believe you kept my Heather from me." Dagur says while he rubs his jaw where Heather had previously hit him. "I was so worried. Was she alive? Was she dead?"

"Oh, please. Drop the act." Heather tells him and turns her anger to Hiccup. "And you! It's bad enough my boyfriend is consorting with my mortal enemy. But then you teach him how to ride dragons? Have you lost your mind?" She asks and grabs his shirt to pull his face closer to hers.

"Heather, he saved my life." Hiccup says, trying to calm her down and put her arms down.

"I don't care! You can't rush him." Heather tells him and slaps his arms away. "You think it's a coincidence that he shows up now before this mission? It's a setup, Hiccup. Can't you see that?"

"To be fair, that was my first thought, too." Astrid admitted.

"He sent me adrift as a child. He killed my family and my entire village and left me to die again. He killed our father, for Thor's sake. He tried to kill each of us multiple times." Heather lists a small

"Most, if not all, of those things are true, but I am trying to change, sister." Dagur promises.

Heather grabs him by the shoulder and raises her ax to his throat. "Don't ever call me that, spy." She warns him and Dagur moves it from his neck.

"I'm not a spy. I don't know how I could possibly prove that. I guess you're just gonna have to take my word for it." Dagur says and sees nobody is. "Yeah, I didn't think I would take it, either, if I were you. So thank you all for the hospitality, but I think Shattermaster and I should be going. Good day." He says and starts leaving.

"Oh, come on. Dagur, Dagur." Hiccup call's as he leaves.

"I said, good day." Dagur says as they can see actual tears as he leaves.

"Was he crying?" Snotlout asks.

"Yeah. Tears of laughter, at us." Heather answers.

"I should probably talk to him before he goes." Hiccup says and follows after him.

Hiccup finds him and sees he found their plan for Arendelle attack. "What are you doing?"

"Everyone kept dropping hints about some big mission." Dagur tells him. "I thought I should take a look. Heather may hate me, but I do not want her flying any suicide mission."

"It's Arendelle. Viggo attacked them a week ago and caught them by surprise. He seems to be doing something there, and forcing the people to the work.

"It's not really defended." Dagur comments.

"It's very remote. Only one way in through the fjord by boat." Hiccup tells him.

"Seems a little too obvious. Attack an ally's home for them to reach out to get help." Dagur comments.

"We've kept an eye on it for weeks. Viggo doesn't defend it because the people are already conquered and aren't exactly the fighting type. No reason to defend it and he thinks that it's a secret invasion." Hiccup explains.

"Let me guess, coordinated attack, using the fjord for cover, but staying up out of sorrow range?" Dagur asks him and that's exactly their plan.

"Something like that."

"You're too gullible, Hiccup. That's your problem. I tricked you plenty of times."

"Yeah, and I'm still here."

"Hiccup , What did Dagur..." Astrid was asking and she sees him and pulls out two knives before running them at his neck. "So you see a spy!"

Dagur just removes the knives from his neck. "Relax, blondie. I was trying to talk some sense into your boy Hiccup, here." He explains.

"We can't let him go now. He's seen the plans." Astrid says.

"I know." Hiccup agrees.

"Fine, lock me up. Then go do your mission." Dagur says and walks off and stops near Hiccup. "But know this, Hiccup. If anything happens to Heather, I will hold you personally responsible." He warns him.

They bring Dagur to Shattermaster in the stalls and lock the two up.

"That should hold him." Astrid states.

"We'll figure out what to do with you when we get back." Hiccup promises Dagur.

"I have some ideas." Heather says raising her ax again.

"Just one question, Hiccup. Who attack now? Did the number of ships coming in to Arendelle happen to go up?" Dagur asks.

"Uh...Yes. From eight to twelve." Hiccup admits.

"Of course they did!" Dagur shouts as he throws his head between the bars. "Because eight ships weren't enough to draw you in fast enough! Use your brain, Hiccup."

"I am, and you know what? It's telling me not to trust you." Hiccup tells him and they all leave him.

"You're on guard duty, chicken." Tuffnut tells his pet. "Keep an eye on this guy." He says and Dagur looks at his guard completely confused.

-

The next morning, they're all saddled up, ready to attack as Hiccup and Heather get ready to head out in their hut.

"Dagur couldn't be right about this mission too easy, could he?" Hiccup asks as they make their way down to the others.

"We've been watching the ships for weeks. We haven't seen anything out of the ordinary." Heather states as she grabs a barrel of Monsterous Nightmare gel. "Dagur is still working for Viggo. He was just trying to keep us from attacking his master. He's a liar and a spy."

At that moment, Chicken comes running to Tuffnut and is clucking.

"What's that, Chicken?" Tuffnut asks and clucks back as chicken drops from exhaustion. "Dagur has escaped?"

"I told you." Heather says and they run to the stalls to see Shattermaster did it.

"Shattermaster broke him out." Hiccup sees.

"You have to admit. He really has bonded with his dragon well." Fishlegs says and the couple look to him with an eyebrow raised. "I'm just saying."

They all head out and load their dragons. "Wings up, gang. We have to hit those ships before Dagur has a chance to give away our plan." Hiccup says and they take off with Elsa on Toothless.

-

The team flies off and see they're approaching Arendelle and don't see Dagur.

"Anyone see Dagur? Maybe we beat him here." Hiccup asks them as they enter the fjord.

"There he is." Astrid says and they see Dagur and Shattermaster flying through.

"Pay, here's the..." Hiccup was saying when Heather and Windshear blow past and make her way to Dagur.

"This is your last betrayal, Dagur." Heather promises and shoots several blasts that he dodges without even looking and then flies upwards to keep the sun in Heather's eyes. As she looks for him, Dagur comes up behind him and Heather swings Windshear's tail to try and hit him. "You can't loose me that easily."

She then flies through the fjord and Dagur uses the inverted Gronckle drop and goes underneath Windshear and hits a soft spot, taking Windshear down.

"What do we do?" Astrid asks.

"Even when he warns them, they'll still need time to react." Hiccup tells the team. "We hav to hit them, now!" He says and they all fly at them.

"Ahoy, in Arendelle." Dagur greets them. "I have a message for Viggo. Tell him Dagur the Deranged says hello." He tells them before Shattermaster drops lava on their ships and an arsenal of catapults and archers appear in the hidden areas of the mountains. "Yeh. Trap." He says and starts avoiding the fires and catapults.

Hiccup stops as he sees the attack and fire.

"What's he doing?" Elsa wonders, getting confused.

"Proving he was right. That it was a trap all along." Hiccup says as they watch him use his daggers and Shattermaster to fight them all off.

"Come on, Shattermaster! Let's show 'em what a real Rider and his dragon can do!" Dagur says as he pulls out two knives and they go charging into the smoke and all they can see is more explosions and attacks.

What they didn't see was his daggers falling into the ocean.

"Come on! We have to do something!" Snotlout states.

"Snotlout, there's nothing we can do." Hiccup says, regretting not believing him as they look and see the water spirit moves the wreckage and drives the rest of the hunters out of Arendelle.

-

Lieutenant Matiias, captain of the guard, reported there was no sign of Dagur or Shattermaster which could mean a number of things. What was even stranger it seems that they were forcing the civilians to transport all of their building material. Steel, tools, some other materials, meaning they must be building something. But what? They can't possibly know.

The team returned to the Edge and cleaned up the plan from the table.

"This is my fault. I should've listened to him." Hiccup tells them.

"He knew it was a trap and he still flew right in." Astrid says.

"They said that they never found him, so maybe..." Snotlout tries to think positively.

"Yeah, maybe." Ruffnut says, hesitatingly.

"I will never forget his noble sacrifice." Fishlegs promises.

"You think my brother sacrificed himself?" Heather asks him. "Not with his ego. He thought he could make it." Hiccup looks and slightly smiles at her. "What?"

"Nothing. It's just..I've never heard you call Dagur brother before." Hiccup explains.

Heather just sighs and pulls up her hood. "I need some sleep." She states and walks out and made it to their hut, where she found a note from Dagur about how he loved her enough to sacrifice everything and that she knew that Hiccup would be there to always watch her back.