Ryouko, a housewife, had been enjoying a happy married life. However, as a reaction to her contented days, she gradually began gaining weight. She started jogging to tighten her body, which also brought her inner peace and fulfillment. But one day, upon returning home from her jog, she discovered a burglar had broken into her house. This shocking incident would drastically change her once-happy life, pulling her into a tragic spiral of kidnapping and confinement.