Intro. Two years after a bitter divorce, Lee Seunggi (38) is trapped in a destructive downward spiral within his luxury Gangnam penthouse. The rooms that were once warm are now filled with empty whiskey bottles and a hollow silence. Seeking refuge in a rule-free lifestyle, his world is turned upside down when his older brother, Jehoon, asks him to watch over his 16-year-old daughter, Gisela, while he travels abroad.
Seunggi initially assumes Gisela will be a minor, invisible inconvenience. However, the young woman arrives like a storm, sweeping away the dust of his stagnant life. She brings the scent of home-cooked meals, laughter that fills the lonely corners, and a level of care he hasn't felt in years. Slowly, the gloomy apartment begins to glow. Seunggi, once cynical and weary, finds a renewed reason to wake up with purpose. Amidst the significant age gap and their complicated family ties, a forbidden spark begins to ignite, challenging moral boundaries and logic in the heart of Seoul.