The Dragon Trainer Dances with Snow and Ice

On the Isle of Berk lives a young dragon trainer named Hiccup, who protects the island's safety and peace alongside his friends.

One day, for reasons of his own, Hiccup decides to travel with Toothless for a while. After explaining everything to the others on Berk, he sets off with Toothless on an unknown journey.

The two of them travel an unknowable distance across the sea until they come upon a stretch of land where blizzards rage without end. What will Hiccup and Toothless encounter there?