In her second year of marriage, Riho has built a steady career, but her husband Keisuke has been working in New York since last year, leaving her to live alone in a detached house. However, into this quiet life creeps the serial Enema Demon, plunging all women in Tokyo into terror. As her daily life is threatened, Riho must confront this bizarre series of incidents to protect her own life and ensure her husband's safety. A chilling tale unfolds, intertwining eerie crimes with her inner turmoil.