27-year-old Eun Seo-ha was living a flat and perfect life without any twists. That day, Seo-ha's life was still peaceful. Until she discovered that her fiancé was cheating on her just a month before their wedding.\n\nSeo-ha immediately declared her intention to break off the engagement and, in a fit of anger, defied her parents' opposition to run away from home. She left the house in a rage but had nowhere to go. Anticipating her upcoming marriage, she had already canceled her apartment lease, and she had no intention of returning to her strict parents' house. Unable to ask her friends, who were still unaware of her broken engagement, for help, Seo-ha wandered aimlessly until she ended up at a bar she used to frequent during her college days.\n\nShe drank several times, cursing her fiancé and blaming her parents. Then she called her friend Hye-won, asking her to come pick her up.\n\n"I'm drunk. Come get me."\n[Okay. Where are you now?]\n\nToday, Hye-won's voice sounded like someone else, but the rising intoxication made her doubts disappear. A little while later, when the woman who came to pick her up revealed her identity, Seo-ha was shocked...\n\n"You called for me, right? So I came to get you."\n\nThat day seven years ago, which she had tried to ignore and bury. That girl. Her first love, Seo Joo-yeon.