In the follow up to the events that occurred in season one, Hiccup, his dragon Toothless, and fellow dragon riders are still the protectors of the Isle of Berk in this series based on the movie How to Train Your Dragon.
After Alvin and the Outcast Tribe steal the Book of Dragons, it is only a matter of time before he learns how to train his own dragons. Throughout this season, Hiccup and company encounter new and dangerous dragons.
A new fierce lightening-powered dragon, called a Skrill, is discovered frozen in ice. When the dragon thaws out and is unleashed, he's captured by Alvin the Treacherous. Hiccup, Ruffnut and Tuffnut go undercover and find out that there is a truce between the Outcasts and the Berserkers. They plan to invade Berk and use the Skrill. The three of them scramble to free the Skrill before their truce is settled.
Gustav gets his own dragon named Fanghook and joins the Academy, much to the others' dismay. Alvin the Treacherous returns to Berk claiming he wants to make peace. Hiccup must now work with Alvin to save his father from the wrath of Dagur. He also discovers the true intentions of a new dragon called Screaming Death and comes up with a plan to end the war, stop Dagur and save Berk.
