It's been five years since the dragons and Vikings made peace. Everything's okay for Hiccup and the gang, until an almost fatal fire caused by himself sends him away from Berk. He winds up in Arendelle where he meets Elsa the new Queen of Arendelle a polite, reserved girl with a cold secret. The friendship between them starts to spark. Love at first sight. On the day of her coronation she reveals her secret of ice powers. Full of fear runs away her kingdom and her sister, trapping it in an eternal winter.

Elsa has finally found her place as Queen. Anna has found her true love, and Kristoff has learned how to not be lonely. Everyone in Arendelle is aware of Elsa's icy Magic. But when a dark man from the shadows kidnaps all three of them and locks them in a makeshift house, and Elsa is now curious about who the man is and why he wants them. One of his workers later reveals himself. Elsa soon meets Hiccup, a young man with a dragon, whose heart and soul have no existence. Someone who lives in the house tells her, that he had been under the dark man's control for several years and has no way of breaking free. Determined to save her sister and Kristoff. Elsa tries to snap Hiccup out of his dark hearted life in hopes he will help them out of the dark hold.

In Arenberk High-school The Big Four is the popular group, consisting of Jack Frost, Rapunzel Corona, Merida Dunbroch and Hiccup Horrendous Haddock III. A new girl comes to their school Elsa Arendelle. She's shy and reserved and seems to shut out people. But the gang feel Elsa has a secret. Now the Four bring the new girl into their group in hopes to find out the truth and secrets behind Elsa Arendelle. Second Book: Keeping A Promise