Picking up just after the events in How to Train Your Dragon 2, Hiccup, Astrid, and company are called upon to assist the people of an earthquake- plagued island. But their lives are imperiled by a madman and an incredible new dragon who even Toothless, the alpha dragon, may not be able to control! Dragons writer, director, and producer Dean DeBlois is coplotting these stories. Stories tie in to the upcoming 2018 film.