Married woman Mio (28) embarks on a one-night, two-day trip with a man she's just met. For 24 hours, we follow her inner turmoil—she loves her husband, yet suffers deeply. "I'm just running away from facing him..." she murmurs inwardly. In their second year of marriage, they are a dual-income couple. A late-blooming woman whose first love came in her mid-twenties, Mio was actively pursued by a man 17 years her senior who had been divorced before. After dating, they married a year later. They lived a seemingly happy life—until one day she discovered her husband's diary detailing his past life with his ex-wife. It revealed their marriage had collapsed due to conflicting views on having children. Now, a rift grows between Mio, who desires a child, and her husband, who does not. Where does her husband truly stand? Resolved, the married woman sets off on her journey, trembling and entranced in the arms of a man she's just met.