Jo Seok-Moo (Cha Tae-Hyun) graduated from a prestigious university, but he pursued his dream of becoming a musician rather than finding a traditional job. Jo Seok-Moo unfortunately did not become a musician and because of his advanced age, he could not land a decent job. He finds a job at a security service company where he met Kang Whee-Roo (Bae Doo-Na) for the first time as his customer. They eventually get married and have been for 3 years now, however suddenly Jo Seok-Moo asks for a divorce. When taking a closer look they do not have very much in common. Jo Seok-Moo has a stubborn personality and enjoys spending time alone, while Kang Whee-Roo is easy-going and has a positive personality. Meanwhile, a married couple of Jin Yoo-Young (Lee El) and Lee Jang-Hyun (Son Suk-Ku) appear. Which comes to a surprise because Jin Yoo-Young is Jo Seok-Moo's first love.