One of us is lying

Five students walk into detention. Only four walk out alive. When Simon — the creator of a gossip app that exposes everyone's secrets — suddenly dies during detention, the remaining four students become prime suspects. Each of them had a reason to hate him. Each of them had something to hide. As the investigation unfolds, secrets unravel and alliances shift. But in a world where everyone is lying, the truth becomes the most dangerous weapon of all.