Yui is a married woman who inherits her mother's will and becomes the proprietress of Kirishima Manor, but soon finds herself in conflict with the powerful local Tachibana Group. The Tachibana Group operates numerous adult businesses and facilities, intensifying their efforts to acquire Kirishima Manor. Betrayed by a trusted staff member, Yui is kidnapped and confined in a basement. As she faces this dire situation, the story unfolds with increasing tension and depth, drawing viewers into her desperate struggle for escape.