On Thursday afternoon, five students at Bayview High walk into detention. Bronwyn, the geek, is Yale-bound and never breaks a rule. Addy, the beauty, is the picture-perfect homecoming princess. Nate, the bad boy, is already on probation for dealing. Cooper, the jock, is the all-star baseball pitcher. And Simon, the outcast, is the creator of Bayview High's notorious gossip app. Only, Simon never makes it out of that classroom. Before the end of detention, Simon's dead. And according to investigators, his death wasn't an accident. On Thursday, he died. But on Friday, he'd planned to post juicy reveals about all four of his high-profile classmates, which makes all four of them suspects in his murder. Or are they just the scapegoats for a killer who's still on the loose? Everyone has secrets, right? What really matters is how far you would go to protect them.