Y/n Thorston, the older sibling of both Tuffnut Thorston and Ruffnut Thorston. They had always been quite comedic and was always there in times of need. They had been carried off by a legendary dragon only spoken about in myth, The Boneknapper. A young Boneknapper although still quite strong had carried them off towards an unknown island, Y/n was never to be seen again after that incident. Now that Berk has formed peace with the dragons, Tuffnut and Ruffnut have trained a Zippleback Dragon and travel with Hiccup Haddock, Astrid Hofferson, Fishlegs Ingerman and Snotlout Jorgenson. What'll happen when they come across a dragon auction and find a Boneknapper burning the place to the ground with a mysterious rider on top of them?