"During the precarious tightrope walk in the grand circus of life, everyone will encounter a certain number of events. Perhaps it is the unexpected events that truly reflect the nature of life." At 32 years old, Lee Hyung, a lawyer who seems to be on a smooth path, suffers from severe insomnia. To soothe the long nights, he occasionally visits a bar underground, sharing warmth with unfamiliar women. One day, he unexpectedly reunites with Soo Yeon, with whom he had impulsively spent a night, in an unforeseen place. "Do you regret sleeping with me?" Lee Hyung feels uncomfortable with Soo Yeon, who looks at him as if she has never been hurt before. In a lonely and precarious city, the 23-year-old and the 32-year-old walk through a rich and sweet maturity. The immature story of Soo Yeon and Lee Hyung.