Coming towards them was the biggest dragon that Caverna had ever seen, its wingspan was terrifying and it was coming straight towards them. Fishlegs and Snotlout had seen this kind of dragon before, and this made them all the more terrified. They recognised it as the dragon that they had first come up against on Dragon Island, when they first started to ride dragons, the same one that Hiccup had lost his left foot going up against.

"Ugh guys, we sorta need to run now." Caverna told the two boys who seemed to be frozen.

Eventually, her words seemed to click as the dragon almost landed on them, and Caverna gave a sharp whistle, Snowcap bounding over and picking Caverna up and throwing her on her back, before Meatlug and Hookfang done the same with their riders. Yet, this soon proved a bad idea, because once they were in the air, the larger dragon flew after them.

"We need to find the others." Caverna shouted to Snotlout and Fishlegs.

"Um...How do you expect us to do that, exactly?" Snotlout shouted back.

"You two go and find Hiccup, Astrid and the twins, leave this one to Snowcap and I." She told him.

"No way, Caverna." Fishlegs told her immediately. "I don't want to lose you."

"Fishlegs I'll be fine, and anyway, Snowcap is the only one fast enough to keep this thing busy." She reminded him.

Fishlegs had to give up trying to convince her, because he knew that he was never going to win, so in the end he flew off with Snotlout, going to find the rest of the gang. When they were gone, Caverna and Snowcap started to try and get the bigger dragon to turn around away from where the two boys had gone. After a few plasma blasts from Snowcap, the dragon done exactly that and followed them.

Meanwhile, Snotlout and Fishlegs had found the twins and they were flying off to where Hiccup and Astrid went. They eventually landed by their campsite and Fishlegs and Snotlout ran over to them.

"Hiccup! Astrid!" Snotlout shouted.

"What's the matter, Snotlout?" Hiccup asked as he and Astrid ran to him with Stormfly and Toothless looking up from where they lay in the sun. Almost immediately, Toothless noticed that his mate wasn't there and this seemed to alert Hiccup as well who started to panic as to the whereabouts of his sister. "Where's Caverna and Snowcap?" Hiccup asked.

"A dragon, it came towards us, we got into the sky, but it followed and we came here as Caverna and Snowcap led it away." Snotlout answered, rather out of breathe.

"What do you mean a dragon?" Hiccup asked, he sounded impatient at this point. "She wouldn't do this for any reason."

"Another red death, only this one was blue." Fishlegs told him. "Hiccup we have to find her."

Horrible images flashed through Hiccup's head of what could happen to his sister because of this dragon, and he wasted no time in simply running to Toothless and jumping on his back, getting him into the air as soon as possible. The other teens looked on as he left, though Astrid had noticeable paled at the mention of the Red Death, and images of what happened to Hiccup flashed through her mind, before she snapped herself out of it and ran to Stormfly, flying after Hiccup on her. At seeing Astrid leave, the rest of the group followed suit, Fishlegs and Snotlout leading them towards where they had parted ways with Caverna beforehand. They then went in the direction that they perceived she had flown, and they soon heard a deafening call that could have only come from the dragon itself. They were close, and all too soon, they were going to see it.

When they eventually came up against it, everyone seemed to freeze, remembering the events of what happened with the last one and Hiccup could feel everyone's eyes go from the back of his head then down to his prosthetic leg. However, he didn't have Toothless hovering for long, before he saw his sister, she was falling through the clouds in front of them, and Snowcap was nowhere to be seen. This alerted Toothless as well as they both shot forward, leaving the teens behind and looking on in surprise, as he flew towards his sister, grabbing her from the air so she landed on his back and Toothless looked around for his mate.

"She's fine Toothless." Caverna told him, as she wrapped her arms around Hiccup's waist.

"Are you alright?" Hiccup asked her, his voice full of concern and worry.

"I'm fine Hiccup; don't worry so much about me, I know how to look after myself." Caverna told him.

"I have the right to worry about you, I'm the big brother and you're the little sister, it's my job to worry about you." Hiccup told her.

"I'm not a little girl Hiccup." She told him. "And our friends needed to get away." When he had flown back to join the other teens and Cavern pulled her hood and mask down to whistle. A few minutes after her whistle, there was a cry that could only come from a Night Fury and Snowcap flew overhead.

"Snowcap!" Caverna called and as the Night Fury flew low, she jumped onto her back, rubbing the top of her head.

"What do we do?" Astrid asked them.

"Head home, the dragon was injured, Snowcap caught its eye, and the best thing for us is to go home." She told her.

The other teens nodded, but Hiccup didn't seem too keen. "You guys can go home, but I want to find out where that dragon is going." He told them.

"No Hiccup, come home." Caverna told him.

"Caverna, as the oldest, I'm telling you that I'm staying." Hiccup told him.

"And I'm telling you that you're not." Caverna told him. "Dad will want to know what's going on and if we come back without you, he'll kill us."

"Just go home Caverna, that's an order."

The fact that he called it an order, made Caverna's blood boil and she was about to hit him, before she felt someone or something grip her hand and she looked up to see Fishlegs holding her hand and giving her a calming smile, before she looked at her brother.

"Don't expect me to mourn you if you get killed, in fact don't expect anything off of me if anything happens to you." She told him, before she had Snowcap fly off back towards Berk.

Everyone then turned to look at Hiccup, before Astrid decided to break the silence once and for all. "Hiccup, come on, let's just go back, Caverna's right, not only will your dad kill us, but that dragon will too." She told him, reaching over and taking his hand.

Hiccup sighed, looking at his and Astrid's hands. "I went too far didn't I?"

"Yeah, you did." Astrid told him. "Just come home Hic, come home and we'll find another way to study it that won't get us killed."

Hiccup sighed. "Fine, let's go." He had Toothless turn around and they followed the others back towards Berk.

When they all arrived back on land, Hiccup and Astrid headed up to Hiccup's home, with Stormfly and Toothless following them, yet when they got there, there was no sign of Caverna, Snowcap or Stoick and this got Hiccup worried.

"She was coming back here, right?" Hiccup asked Astrid.

"Of course, where else is she going to go?" Astrid asked him.

"I have no idea." He sighed. "She's probably with dad in the Great Hall."

"Yeah, come on, let's go and see if she is there." Astrid told him, sliding her hand into his and walking towards the Great Hall.

When they got to the Great Hall, there seemed to be more Vikings in there than usual, and Hiccup soon remembered why, which caused him to give out a groan.

"What's the matter?" Astrid asked him quietly.

"Today is the signing of the treaty with the Berserker tribe." Hiccup told her. "Dagur's here."

This caused Astrid to groan, and then they noticed Stoick gesturing for them to join him, which they reluctantly did, and they saw Dagur. He had certainly grown up lately, and this was something both Hiccup and Astrid noticed, but that wasn't Hiccup's problem now, finding his sister was.

"Dad, where's Caverna?" Hiccup whispered.

"You'll see." Stoick whispered in return, before he stood up. "Dagur, may I introduce to you my daughter, Caverna." As he spoke, the doors opened and both Hiccup and Dagur were on their feet as they saw Caverna standing there. Her normal suit was gone, and her hair hung down her back, she was wearing a red dress with a white fur shawl around her shoulders to keep her warm, as she walked towards her father, brother and Dagur, the light illuminated her beauty. Hiccup saw Dagur's jaw drop as Caverna got closer, he was obviously mesmerised by her, just as every other young man he had brought with him seemed to be.

When Caverna got to the table where her father sat, he gestured for her to greet the guest and she walked to Dagur's side, curtseying to him, before he took her hand and kissed it, looking back at his father. When he turned away from Caverna, Hiccup couldn't help but smirk at the look of needing to be sick, came over her usual expressionless face, but by the time Dagur turned back to her, she was back to emotionless.

"If I had known that I would have been graced with such a presence, Stoick, I would have worn my best armour." Dagur told him.

"It was no need Dagur, now if you are finished with your meal, perhaps you would like your tour of Berk?" Stoick asked.

"Only, if this dashing young thing is the one to escort me." Dagur told him, suddenly grabbing Caverna's hand and dragging her out of the Great Hall, despite her look of desperation, she had no choice but to follow him.

When they were gone, Hiccup ended up sitting in his chair in hysterical laughter, which had Stoick concerned since he didn't stop for a while.

"Hiccup..."

"I can't believe you got her into a dress and got her to be Dagur's escort." Hiccup eventually got out as he slowly calmed down.

Stoick just smiled. "Well, it was hard work getting her to agree with it, but not harder than keeping Snowcap away from her."

"Stoick, we have a problem!"

Stoick and hiccup both looked over to where Gobber and Spitlout, Snotlout's father, were running into the great hall towards them.

"What's the matter?" Stoick asked, suddenly becoming tense.

"Snowcap escaped, but that's not just it." Gobber explained.

"What else?" Stoick asked them, not sure if he really wanted to know what else was wrong today.

The two men led him outside, with Hiccup hot on his heels and they soon saw the worst of their worries the Blue Death was coming straight towards them.

"Hiccup, go and find the other dragon riders, and your sister, I'll get Skullcrusher, we need to get this thing away from here." Stoick told him.

Hiccup nodded, and he made a call to Toothless, who came bounding over from where he was hanging upside down from the inside ceiling of the Great Hall. "Come on Bud, we need to find the others." Hiccup told him as he got onto his back, and at feeling his rider pat his neck, Toothless flew into the sky looking for the others. Meanwhile, Caverna was walking around with Dagur, showing him where everything was, and they eventually stopped at the Training Arena. Caverna was just watching Dagur walk around the training arena, and she didn't notice Fishlegs fly over, so when she turned around, she jumped.

"Oh hey Fishlegs." She smiled.

Fishlegs looked at her, he was in a daze having never seen her in a dress before, but he obviously liked it. He soon snapped out of it, and he had Meatlug land next to her.

"We have a problem, the dragon followed us here, Hiccup's told me to come and get you."

"Alright, get me into the air and I'll call Snowcap." Caverna told him, hitching up her skirt and taking his hand, sitting behind him on Meatlug, just as Dagur ran to them.

"Where do you think you're going?"

"I have to help my dad, I'll e back for you soon Dagur." She told him; as Fishlegs flew off on Meatlug, towards where they were due to meet the other dragon riders.

When they got there, Fishlegs had Meatlug land on the cliff and both he and Caverna dismounted the Gronkle and she shook her dress out. This caused a few wolf whistles from Snotlout and Tuffnut, and Caverna gave them a glare.

"Caverna you are not coming out to fight in your best gown." Stoick told her sternly.

"I know, that's why I'm going to strip." She told him, and as everyone watched her with a shocked expression, she slid the dress off but instead of being naked, as everyone thought, she was wearing a pair of leggings and her green tunic underneath.

"Tadah!" She told them, before she whistled loudly and not long after the whistle faded, was there a loud roar and Snowcap suddenly sprung into the sky not far away and she landed next to her rider, nuzzling her, before she shared a loving nuzzle with Toothless, yet the intimacy of the gesture soon made Hiccup uncomfortable since he was still on Toothless' back.

Caverna watched her brother and she suppressed a giggle, before she clicked her fingers and Snowcap walked to her obediently and Caverna put her dress neatly into one of her saddlebags, before she climbed into her saddle and Snowcap padded over to stand beside Toothless.

"Okay Hiccup, how do you want to do this?" Astrid asked him as she stood on his other side, gripping the handles of Stormfly's saddle, ready to fight.

"We need to try and steer it away from Berk, keep it over open water." He looked over at Fishlegs. "Fishlegs, have we got anything on this dragon's weaknesses?"

"No Hiccup." Fishlegs told him, he sounded worried.

"Alright then, let's just do our best."Hiccup told him and they all flew off, toward the Blue Death.

"And try and make it home with the limbs we went with." Snotlout shouted over, which had Hiccup rolling his eyes but he did smirk at his cousin.

They were all soon engaged in battle, trying to steer the Blue Death as far away from Berk and as far out into the open ocean as possible, and they had done that, but getting it to leave was proving the most difficult. They had already suffered a few injuries, well except for Hiccup and Caverna, who's Night Furies tended to simply fall from the sky and then regain their flight any time that they were fired at. It went on for hours and the dragons were all getting tired, and most of them had reached their shot limit, so now they were more or less defenceless.

"Hiccup, we have to turn back." Astrid shouted over as she dodged another burst of fire from the dragon.

"We can't just stop Astrid; we can't risk it getting to Berk." Snotlout told him.

"She." Caverna suddenly shouted over.

"What?" They asked all looking at her and they noticed that she was flying too close to the Blue Death.

"It's a she." Caverna shouted over. "And I think I know why she's here." She looked at Snowcap who seemed to be having some form of conversation with the larger dragon.

"Why are you here?" Snowcap asked the Blue Death.

"I just need a place to hatch my eggs." That was the only reply that Snowcap got, and she nodded.

"I understand, but here isn't the best place, no one but the riders somewhat understand us, Berk won't be safe for your eggs." Snowcap told her.

"Snowcap, get away from there!" Toothless suddenly shouted over.

"No Toothless, wait." Snowcap told him, though she kept her eyes on the much larger dragon. "My rider will find you somewhere to rest though, if you have nowhere else to go, but you must be cautious."

"I will be thank you Snowcap." At Snowcap's nod she looked at the girl on the back of the dragon who had ever so slowly reached out her hand to the bigger dragon. The bigger dragon sniffed it, before she determined that this rider meant her no harm, and she touched her nose into the smooth softness of the girl's hand.

"It's okay; I'm not going to harm you." Caverna told the dragon, who seemed to understand her quite well, and she smiled. "Come on, let's get you somewhere safe."

Caverna had them fly back towards Berk, but as they landed, there was a cry and Caverna looked up to see Dagur running towards them brandishing an axe.

"Dagur, no!" Hiccup shouted, but he watched his sister suddenly grab the handle of the axe from him and she threw it in a direction away from the dragons.

"Don't you dare hurt her." Caverna told him.

"She's a dragon, they must be destroyed."

"Then you'll have to get through the rest of us." She told him, walking over to the larger dragon and Snowcap, who was stood in front of her new friend, protecting her from Dagur.

"It's okay." Caverna told the bigger dragon, knowing that with her close, Snowcap would calm down.

"What's goin' on here lass?"

The question came from Gobber who, at seeing the Blue Death land and stand so close to his children, had fretted and picked up his sword running to their aid, but he was fully surprised by what he saw.

"Her name is Sapphire; she just needs a place to rest." Caverna told him.

Stoick sighed, shaking his head as he dismounted his dragon. "You and your brother will be the death of me, alright, but she needs to stay away from the village, she's a bit too big."

Caverna nodded. "Don't worry, I will." She looked at Sapphire and Snowcap. "Come on, let's go home." She climbed onto Snowcap's back and flew off towards her home, the Blue Death following her.

Stoick, Hiccup, Astrid and their friends all simply watched her go with almost surprised fascination. Yet they were still haunted from the events that happened the last time that they faced one of those dragons. However, after a while of silence, Astrid finally decided to break it.

"Yep, she's definitely your sister." Astrid told Hiccup with a playful shove, which made him laugh.

"Yeah, I know." He sighed. "I still haven't apologised to her."

"Well, go now." Astrid told him. "The dragons won't mind."

Hiccup sighed and nodded, before he and Toothless walked up towards their home, hoping that Caverna was still there. When Hiccup had gone Stoick looked at Astrid.

"What does he need to apologise for?"

Astrid looked at the chief, and she told him everything, before he also let out a long and exasperated sigh. "Spitlout and I used to be the same, always at each other's throats."

Astrid nodded. "They just want the best for each other, they wanted to keep each other safe at the cost of their own lives."

"Yeah, you have a point there lass." Gobber told her. "Add that to the fact that they haven't had much time to bond since now they're both eighteen years of age, and they're both used to not having to take much orders from anyone."

"Yeah, that mustn't be able to help." Fishlegs added.

Everyone sighed, looking towards the Haddock house, they could hear Hiccup and Caverna arguing and it tore at Stoick's heart, he hated either of them being upset but he knew that what they were saying needed to be said. He just hoped that he had a house still standing afterwards.