The story tells the relationship between two married people, In-soo and Seo-young. They realised that both their spouses had love affairs with their partners after being involved in an accident. Their relationship grew as they approached each other for help occasionally.

Cast
Bae Yong Joon - In-soo
Son Ye-jin - Seo-young
Im Sang-hyo - Kang Soo-jin
Kim Kwang-il - Kwang-il
Jeon Kuk-hwan - Soo-jin
Yoo Seung-mok - Doctor
Kim Se-dong - Security Guard
Jeon Dae-byung - Policeman
Yoo Seung-soo - Yoon Kyung-ho