Set in the mythical world of burly Vikings and wild dragons and based on the book by Cressida Cowell, action comedy “How To Train Your Dragon-2” tells the story of Hiccup, a Viking teenager who doesn't exactly fit in with his tribe's longstanding tradition of heroic dragon slayers. Hiccup's world is turned upside down when he encounters a dragon that challenges him and his fellow Vikings to  see the world from an entirely different point of view.