- 35-year-old architect Seung-Min receives a visit at his office from a woman. Seung-Min doesn't recognize the woman at first, but then realizes the woman is Seo-Yeon.
- The paths of three people intersect at a hospital. A lawyer who mourns the death of his wife, a taxi driver who is taking care of his grandfather that suffers from Alzheimer's, and a girl who is looking for a bone marrow donor to save the life her mother.
- This film is a story of May and En-seol. May returns to Seoul looking for her birth mother after 23 years of life as a Korean-American adoptee. En-seol is a taxi driver suffering from a rare cardiac disease. Following their chance encounter at the airport, they come to help each other, also by chance.