Five high school students are in detention: Bronwyn, the brainiac; Nate, the criminal; Cooper, the athlete; Addy, the popular girl; and Simon, the outcast who runs a gossip app that exposes the secrets of his classmates. During detention, Simon collapses and dies from an allergic reaction to peanuts. It is later revealed that his water bottle was laced with peanut oil. The four remaining students become the prime suspects in his murder investigation.
