Eun-soo and Won-oh, who were pretty lovers, split up as worse enemies than others after three years of marriage.
Two years after their divorce, Won-oh, who has achieved great success in business in the United States, returns to Korea and reunites with Eun-soo, but Tae-in, who has had a crush on her all along, is by her side. On the night when the three of them reunite after two years, the three of them drink the same wine and go back to the past five years.
Due to Eun-soo's stubborn will, Eun-soo and Won-oh prepare for divorce again, and Tae-in confronts Won-oh because he is anxious that he cannot lose Eun-soo again. However, Eun-soo and Won-oh, who have come face to face again and live together, are shaken as they learn sides of each other that they did not know in the past.
