The film is narrated by Cayden (Lucas Till), an average teenaged boy approaching the end of high school. During a football game, a rival player headbutts Cayden, causing the latter to become enraged and attack the player with superhuman strength. Cayden later hurts his girlfriend, Lisa (Kaityn Leeb), when the passion of making out causes him to unwillingly transform into a werewolf. Cayden wakes up covered in blood, surrounded by the dismembered bodies of his parents and flees.