Two days before his wedding to Yumi, the daughter of a wealthy family, Seok-woo travels to Jeju for a business trip. However, his flight is canceled due to bad weather, preventing him from returning. There, he meets Yeon-hee, who is wandering after three failed marriages. Traveling together, they share their wounds. Seok-woo realizes that the person he truly loved was his 39th girlfriend, whom he abandoned to marry Yumi. Returning to Seoul, Seok-woo holds his wedding with Yumi, but upon seeing the 39th appear at the ceremony, he runs away with her.