Wolf Dragon Rider

Hiccup was cursed at birth that one day, he would become a werewolf once he was the wolf moon.
Eighteen years later, on Dragon's Edge, Hiccup sees the moon and becomes a wolf. He keeps himself away from his friends, to make sure they are safe and chained himself up every night.
But one night, Astrid saw him change and tries to find a cure, before they lose Hiccup to his beast and get taken by the Dragon Hunters as a tracking dog. Can they save their friend in time?