Summer's almost over, and the wolves and Abby are excited to start a new school year. But things don't go as planned, and Camille and Luna get targeted for experimentation with a deadly serum that turns werewolves rabid. As the serum forces Camille to confront the darkest parts of herself, the others find rising conflicts in different aspects of their own lives. The rush to save Camille and Luna from the serum will bring them all closer, but the decisions they have to make in order to survive will have lasting, dire consequences.