In a seemingly normal high school detention, seven students find themselves trapped together, but there's an unsettling twist: only six are accounted for on the teacher's ledger. The seventh, a mysterious girl named Evelyn, claims to be a ghost who died two decades ago. As the clock ticks and tensions rise, players must interact with the group, piece together clues from the haunting past, and unravel the mystery of what happened to Evelyn before detention ends. Each choice impacts relationships and reveals secrets, leading to multiple endings based on the truths uncovered and the bonds forged during this bizarre, supernatural investigation.