Seok-young, a young woman who is passionate about swimming, meets Woo-ju, a mysterious boy with webbed feet, after moving to the countryside. They form a special bond but are separated when Woo-ju leaves to pursue his dream of becoming a professional swimmer. While he rises to fame in the pool, Seok-young struggles with feelings of insecurity and inadequacy, ultimately leading her to end the relationship. Haunted by a love left unfinished, one question remains: will fate bring them back together?
