Laura, a 25-year-old actress, participates in a Live Action Role Playing (L.A.R.P.) game where players assume the roles of atomic war survivors residing in a sealed underground bunker. When a series of unexplained incidents occur, the game is halted, and the players exit the bunker, leaving the staff to probe into the vanishing of Greg, the game’s creator. However, the staff soon find themselves ensnared inside, facing danger as they start to die under mysterious circumstances. It becomes evident that a supernatural force is toying with them, turning their situation into a horrifying battle for survival.