Before leaving her home and her father to live with her mother in another city, 17-year-old Tianyue spends a brief holiday with her father at a riverside where they often went during her childhood. On the trip, she encounters a man who turns out to be her father’s client, and their ambiguous relationship reveals her hidden yearnings.

Amidst the first signs of a rainstorm and the unease of a goodbye, the girl’s feelings pour out and her father’s choices confuse her. Standing on the border between adolescence and adulthood, she prepares to let go of her past and start anew.