Three young Thunderdrum dragons have come to Berk. Hiccup tries to train them, but they don't like to listen and are causing too much trouble. The dragons have to leave, but they aren't safe on their own. What will the dragons do?
When a series of lightning storms hit Berk, Vikings claim Thor is angry for allowing Toothless, a dangerous Night Fury, to live among them, so it's up to Hiccup to prove Toothless's innocence before he is banned from Berk forever.
Super Why and his friends fly into the story of George and the Dragon and meet the young knight who is too scared to rescue a princess guarded by a terrible dragon. While in the book, they help George find the courage to save the princess.