When a high school field trip takes a deadly turn, the students of Yooil High find themselves trapped in a twisted game of survival in this gripping 2023 thriller. The series follows a class forced to participate in a real-life version of the popular "Mafia" game, where they must identify hidden killers among them or face fatal consequences. As paranoia spreads and alliances fracture, the students must navigate escalating psychological terror and moral dilemmas to stay alive. Led by a resourceful protagonist who understands the game's mechanics, the group struggles to distinguish friend from foe while confronting their darkest impulses. Blending intense suspense with sharp social commentary, this drama explores how ordinary teenagers react when pushed to their limits. With its claustrophobic atmosphere and high-stakes tension, the show keeps viewers guessing who can be trusted as the body count rises and the line between player and pawn blurs.