Late at night or during holidays, when the office is empty, an unexpected crisis occurs—your only hope should be the security guard. However, these guards are human too, and some are cruel, malicious individuals who deliberately commit heinous acts. When a woman forgets her access card and can't leave the office, she's forced to rely on the guard—only to face the terror he's been waiting for. This film depicts the chilling atmosphere and lurking fear as routine security measures turn into threats, exposing the horrifying truth hidden beneath. A raw, realistic portrayal of society's dark side, revealing the sinister shadows of modern life.