Late at night or during holidays, in a deserted corner of the office, a woman who accidentally left her access card behind stands frozen before the security guard. The situation feels like a nightmare, filled with fear and anxiety. In modern society, security measures are standard, and having security personnel on-site is common. However, not all guards are heroes. During empty hours, the guard's sinister gaze and insidious actions reveal his malicious intent toward women. As terror and unease intertwine, the guard's heinous acts come to light. This work captures the intense suspense and dread of a thriller, depicting a helpless situation from which one cannot escape.