Corporate security measures have become essential in modern times. In office buildings and commercial facilities, access card keys are mandatory for entry control. However, if someone leaves the office without their card, re-entry becomes difficult. If such an incident occurs late at night or on a holiday when no one else is around, fear and anxiety multiply. Especially for women caught in such situations, the psychological and physical damage can be immense. To address this, many companies now station security guards on-site for safety reasons. Yet, these guards aren't always heroes. When women are forced to rely on them during late-night or weekend patrols in empty buildings, the shadows they carry—along with their hidden malice—can be far more terrifying than imagined. Immerse yourself in this story that exposes the cruel acts of security personnel and the dark side of human nature.