This takes place about one year after the season finale and Hiccup is 17.
Hiccup and Toothless were always up early to go flying but today he got up especially early. Today was the anniversary of the day Hiccup and Toothless became friends. It was May 15, 827 and spring had finally arrived. Though not much better then winter still better. The pair of friends rushed down stares. The young man got Toothless his 100 fish that were never left uneaten. Hiccup treated himself to an apple and loaf of bread. They both got dressed. Toothless loved his new saddle. The leather ran the length of his back making it more comfortable when Hiccup lied down when flying. Hiccup wore a lot of leather too. Hiss flight suit was equipped with arm bracers that had a compass, paper, and dagger. He also carried a short sword with him sometimes. Hiccup put another loaf of bread, two fish, and two bottles of water. They were off.
Hiccup and Toothless darted into the air. The dragons twirled into the clouds and dived down to the ocean. Hiccup lied himself flat against Toothlesses head and laughed with jot. Only and inch from the water Hiccup flexed his metal prosthetic and opened Toothlesses tail fin. The night fury turned him self and glided across the water leaving a trail of waves in his wake. The dragons rider loved flying even more than the dragon. They glided across the sea for hours when the spotted land. It was one of Berks smaller islands a couple miles off the coast.
"Alright bud time to but up. Toothless we're going to crash into the sea stack. Toothless!" yelled Hiccup. The boy had no idea what was going on but trusted Toothless. Toothless turned his wings more horizon until there was only enough air resistance to slow them down be 2 miles per hour. Toothless glided his feet against the water. He stuck his tongue out. Slobber flew everywhere. Toothless closed his mouth slanted his wings and leaped. He hooked his claws on a small rock and scaled the sea stack with impressive speed. He soared over the top and glided down to the beach.
Stoick woke up much later in the day. The clouds had cleared and the sun shone brightly. The Viking chief settled down to breakfast. He saw Hiccup had eaten all the bread and Toothless all the fish. He of course wasn't pleased by the lack of food but Hiccup was growing rapidly and needed more than one fish a day. So Stoick didn't mind and as for Toothless he was just glad the dragon hadn't stolen the honey. He prepared some eggs which he burnt. He had no clue where Hiccup got his cooking skills form. His mother was just as bad a cook as Stoick. Stoick missed his wife. It had been 17 since he lost her. Hiccup was a lot like his mother he was loving, gentle, curious, he stood up for what he believed in and he was also very sassy.
He strolled down to Gobbers hut. When he arrived he saw the blacksmith was working on a new prosthetic hand. It was shaped like a hand oddly enough. Gobber lost his hand to a Monstrous Nightmare years before he knew Stoick and he tended to use utensils and weapons as his replacement for his hand." How are you doing today Gobber?" asked Stoick. Gobber put the hand on and tried flexing it with his other hand. "Just making new hand. Oh also tell Hiccup I saw those new leg designs and that it needs to be curved more at the bottom." Stoick didn't know what he was talking about." Okay then. Um can you tell me what your talking about though?" before Gobber could answer and bright blue Terrible Terror plowed into the dirt at Stoicks feet. It was Alvin's Terror Spike and it had a note on it's left hind leg.
Hello old friend. We have a little issue. Dagur escaped and is most likely heading to Berk. He doesn't have his armada but there is no telling what he may do. If you recapture him please return him so I can decapitate the brat myself.
Stoick gulped and gave Gobber the note. Stoick went to Fishlegs house and told him to set up watch. Astrid decided to go look for Hiccup and warn him.
When Toothless stopped on the hot sand Hiccup went flying off. She slid across the sand. Toothless was laughing." Wow! Impressive where did you learn to do that? What's so funny?" He turned around and saw his reflection in the water. His hair was sticking out every which way." Oh ha-ha. Very funny." mocked Hiccup. Toothless walked over to his human brother and sat as tall as he could over him and licked his head. Now the boys hair was soaked in drool." Ya much better. Thank you." Toothless was learning how to speak. It didn't sound very clear but you could tell he was saying" Your welcome." Hiccup rolled his eyes still trying to get the spit out of his hair. "Do you not know what sarcasm is?" he said playfully. Crunch Hiccup heard a stick break. He knew it was probably just a dear but better safe then sorry. He pulled out his knife. An arrow whizzed by him and hit Toothless in the foreleg." Toothless!" Hiccup pulled out the arrow. It had some green liquid on it. Toothless passed out and Hiccup was knocked out form behind.
You have probably guessed who shot the arrow but trust me you have no clue on what really happens in the rest of the story.