"What exactly is a marriage...?" A married woman overwhelmed by housework and childcare, financially supporting the household while her husband contributes nothing. Day by day, exhaustion piles up, and something inside her is slowly breaking. She forces a smile, never letting it fade, yet deep down she's suffering unbearably. Their marriage is far from perfect. But their problems go beyond mere arguments—they face serious, deep-rooted issues. One day, feeling she's reached her limit with her husband, she embarks on an overnight trip with a complete stranger. That night, in the arms of a man who isn't her husband, all her pent-up restraint shatters as she loses control completely.