Five students walk into detention. Only four come out alive.

• Yale hopeful Bronwyn has never publicly broken a rule.
• Sports star Cooper only knows what he's doing on the baseball diamond.
• Bad boy Nate is one misstep away from a life of crime.
• Prom queen Addy is holding together the cracks in her perfect life.
• And outsider Simon, creator of the notorious gossip app at Bayview High, won’t ever talk about any of them again.

He dies 24 hours before he could post their deepest secrets online.

The investigation begins.

• It wasn’t an accident.
• All of them are suspects.
• Everyone has secrets.

But what really matters is how far you'll go to protect them.