A dragon rebellion is coming-filled with the meanest, nastiest dragons in the archipielago. Razor-wings, tongue twisters, and vampire Ghoul deaths are attaching vikings and seem to be seeking one soul in particular: Hiccup Horrendous Haddock the third! Only a king can save them...and only a champion with all of the king's lost things can be king. In his adventures, Hiccup has collected quite a few "things" himself. But can a scrawny viking save the archipielago from certain doom? To find out, Hiccup will have to outwit a witch, fight his arch-enemy, and beat back an army of bloodthirsty dragons with just one sword".