A notoriously shrewish TV drama writer and a Korean wave star who fight like cats and dogs every time they meet; a spinster flight attendant landlady and a nosy chef tenant who build a sense of camaraderie; a genius relationship-virgin composer who harbors a secret admiration for a scatterbrained producer. As they crash-land into each other’s lives, will there be love?

While investigating the school files, the frightened teacher Mrs. Park startles and calls the young teacher Eun-young Hur, telling her that the deceased Jin-ju Jang is back. The line dies and Mrs. Park is attacked and killed by a ghost. On the next morning, the teenager Jae-yi Yoon waits for her friend Ji-oh Lim, who has the ability to call the spirits, and they begin a close friendship. The abusive and aggressive Mr. Oh, a.k.a. Mad Dog, is the substitute of Mrs. Park and prohibits Ji-oh to paint and compares the performances of the pretty So-young Park and the weird Jung-sook Kim, raising a barrier between the two former friends. Miss Hur misses her former friend Jin-ju, who committed suicide, and while trying to contact her, she discloses a dark secret about the past of her friend and Mrs. Park.

Hyeong-Do (So Ji-Sub) is an assassin for a company that masquerades as a metal trading company. One day, he takes on a job partnering with a man Hyun-Yi, who is he is to kill afterwards. Hyun-Yi asks a favor to Hyeong-Do which is to give money to his family. Hyeong-Do visits Hyun-Yi’s home where he meets Hyun-Yi’s wife Su-Yeon (Lee Mi-Yeon). Su-Yeon is a former singer whom Hyeong-Do admired in the past. Guilt, an unknown feeling up to this point for Hyeong-Do, begins take over Hyeong-Do.