[9] In part one, restaurateur Mi-ra (Moon So-ri) is satisfied with her ordered, if solitary, life until her ex-con brother Hyung-chul (Uhm Tae-woong) suddenly appears with his much older new wife Mu-shin (Go Doo-shim) in tow.

Part two concerns a quick-tempered young woman Sun-kyung (Gong Hyo-jin) and her relationship with her estranged mother (Kim Hye-ok).

Sun-kyung diligently tries to find employment in Japan, but once her mother dies of cancer, she must care for her young half-brother Kyung-suk and abandon her expatriation.

Part three brings together the first two story lines with the relationship of Chae-hyun (Jung Yu-mi) and Kyung-suk (Bong Tae-gyu) some years later.

Kyung-suk, now a college student, is extremely jealous of Chae-hyun's openness to other men in her life and their compatibility is tested as a result of what he considers her "easy" behavior [her promiscuity is neither confirmed or denied].