Astrid Hofferson's life was changed forever the day she was engaged to Hiccup, the village screw-up. Taking her mother's advice, she decides to give friendship a shot. There's no way she'd fall for him, clearly. But as she gets to know Hiccup Haddock, the lines she's drawn start to blur, and when he starts keeping treasonous secrets, Astrid is bound to get caught in the middle...