On Monday afternoon, five students at Bayview High walk into detention. Bronwyn, the brain, is Yale-bound and never breaks a rule. Addy, the beauty, is the picture-perfect homecoming princess. Nate is the criminal, already on probation for dealing. Cooper is the athlete, the all-star baseball pitcher. And Simon…well, Simon is the outcast and the creator of Bayview High’s notorious gossip app. Only, Simon never makes it out of that classroom. Before the end of detention, he’s dead. And according to investigators, his death was no accident. Simon had plans to post juicy reveals about all four of his high-profile classmates—which makes all four of them suspects. Are they accomplices in murder…or are they the perfect patsies for a killer who is still on the loose?