Natsumi Kitahara is a timid, stress-prone cleaning lady who is constantly bullied by a male employee who sexually abuses her every night. To cope with the stress, she develops a habit of shoplifting. One night, an employee catches her in the act. The man, who vents his daytime work stress by taking it out on Natsumi at night, continues his cycle of abuse. This repetitive dynamic creates a strange sense of catharsis for the viewer.