Nurse Reiko's husband is away on a long business trip, leaving her feeling exhausted from the loneliness of daily life. To fill the emotional void, she becomes obsessed with seducing her patients to satisfy her sexual desires. She finds intense excitement in the act of being secretly watched during their trysts, turning it into a new source of pleasure. When others discover her actions and confront her, Reiko welcomes the attention, using them as tools to further fulfill her cravings. As a married nurse with a deeply perverse side, her behavior becomes increasingly compelling to uncover.