Manami lives happily with her gentle husband in a luxurious mansion far from civilization. However, one night, a sudden storm causes a power outage and road closures, leaving her stranded alone with Shinji, a crude and filthy servant who resides in a separate building on the estate. Though initially shocked by the unexpected turn of events, Manami tries to remain calm and composed. Yet, as the situation grows increasingly unpredictable, her composure begins to crack. Shinji's demeanor starts to shift, revealing a feral, animalistic desire that terrifies her. For Manami, this night is more than just a storm—it becomes the beginning of a life-altering ordeal.