18+ DETECTIVE STORY One murder. A town turned upside down. When a classmate is killed at a party, four seniors from class 12B are suddenly forced to grow up-fast. Mysterious notes and anonymous calls start arriving. Bodies begin to pile up. Panic spreads. The FBI moves in. All evidence points to the four friends. They say they're innocent-but are they hiding something more dangerous than anyone imagined? Everyone wears a mask. Everyone keeps a secret. And someone is willing to do anything - even kill - to keep theirs buried.