Grizzly Bear Lake Town is a remote and peaceful town. However, the appearance of a psychopathic killer broke the peace here. Lenny (Shanley Caswell) is a vegetarian student with a mediocre appearance and a rigid style. With her awkward and competitive personality, she has become an object of rejection by everyone in school. Lenny's friend Aine (Spencer Locke) is a popular cheerleader on campus. Unfortunately, because he also likes the boy Clapton (Josh Hutcherson), their friendship quickly ends. The death of a schoolgirl has sent eight people, including Iain and Clapton, to detention and cannot leave school until they find the killer. However, according to a mysterious student's review, previous students on probation were killed by psychopathic killers, while at the same time, they discovered that the world would be destroyed in ten minutes. In order to save her life, Lenny drove a time machine and traveled back to the source of everything in 1992. There, can she become a hero who saves the world?