A doomsday virus suddenly sweeps across the city. Infected individuals retain their lifetime professional skills to slaughter zombies, and every wandering monster is an unknown survival blind box. A retired judo old lady is skilled in combat kill moves, a retired security guard is proficient in lurking and tracking, and a yoga instructor has unmatched physical distortion, hiding deadly combat power beneath ordinary appearances. Architectural data clerk Li Mowen, along with boxing sparring partner Zhao Ye, community nurse Su Yan, and young sentry Wu Xiaoman, hurriedly band together, struggling to survive relying on the unique skill of memorizing building floor plans. Trapped in buildings and besieged by functional zombies, the group repeatedly breaks through at the edge of life and death, unexpectedly encountering a top-skilled lone survivor while searching for supplies.