Emi works at a hospital and accidentally comes across medical records from her colleague, Dr. Kudo. She notices prescriptions for non-insurance-covered drugs, raising her suspicions. Due to severe staff shortages, Emi is assigned even basic patient care tasks like bathing. One day, while cleaning a patient, she becomes aware that the patient is sexually assaulting her. Another patient witnesses the scene, leaving Emi humiliated and confused. Later, she is attacked by someone inside the hospital at night, but Kudo rescues her from the danger. However, Kudo soon begins to exploit the secrets he's uncovered, using them to manipulate and torment Emi.