Just before her 30th birthday, Kanna is gifted a ticket to stay at a luxury hotel by her beloved husband. And just as she is at the peak of her happiness, it's 3:00 PM. A group of three suspicious masked young men arrive at the hotel room where she and her husband have checked in. In Kanna, her husband has secretly owed Kanna a large amount of money and has made a contract to offer his beloved wife as collateral. For the 20 hours until she checks out, Kanna is throat-raped by the young men, and something begins to change in the back of her throat...