Chi Mo, a 28-year-old advertising planner, has ended her ten-year relationship with Guan Yizhou. She moves into a small rented house, applies to work in New York, and thinks the hardest part is already over. Until, on the seventieth day after the breakup, she kisses Song Huaiyu, and the next day, when she hears Guan Yizhou's voice, she instinctively hides. Song Huaiyu is Guan Yizhou's best friend. She has decided to leave, but she has not yet learned how to live freely. Song Huaiyu has known Chi Mo for ten years, and he has loved her for longer than she knows. He finally has a chance to get close to her, attentive in concrete ways, and eager to the point of being almost reckless.