Deok Gu, a 7-year-old boy, lives with his little sister, Deok Hee, and his grandfather in a country village. A few years ago, Deok Gu’s father had passed away in a traffic accident, and soon his mother ran away with father’s death benefit. Doing a part-time job only for the living, grandfather struggles to raise kids, and it’s not easy to buy even a small toy for Deok Gu. While Deok Gu is going to enter the elementary school, grandfather gets to know that there is not much time left for him. But Deok Gu is too young to look after his sister and even himself. So, grandfather prepares a present for his grandchildren that might be the last.
(Source: KoBiz)
Lee Yeong Oh is a genius neurosurgeon who just came back to Korea after finishing his studies abroad. He now works with his father, Lee Gun Myung, who is the head of the cardio-cerebrovascular center at Hyunsung hospital. However, Yeong Oh lacks empathy towards his patients due to his antisocial personality disorder.
One day, traffic policewoman Gye Jin Sung sees a murder in front of her, which was disguised as a traffic accident. She rushes the victim to Hyunsung hospital, where her crush Surgeon Hyun Suk Joo, of the cardiothoracic section, and Surgeon Yeong Oh operate on him. Unfortunately, the patient dies and she starts suspecting Surgeon Yeong Oh of foul play. Meanwhile, a series of bizarre patient deaths start occurring at the hospital and Yeong Oh starts investigating it.
Several years ago Kong-Sil (Kong Hyo-Jin) was involved in an accident. Since that incident, Kong-Sil is able to see and hear ghosts. She's also terrified of the ghosts that appear constantly around her. Because of this, she's unable to live a normal life. Kong-Sil lives in a rooftop room at an extended stay inn. She makes a living by doing odd jobs at the inn, including cleaning.
Meanwhile Joong-Won (So Ji-Sub) is the president of an extravagant shopping mall named Kingdom. He is also arrogant and calculative. Everything relates to him in terms of money.
One raining evening, Kong-Sil goes to room 404 to clean, but she sees another ghosts. She freaks out and runs up to her rooftop room. The ghost, who looks like an old woman, appears right next to her again. Kong-Sil then does the old woman ghost a favor and goes to her home. She hands the ghost's son a bankbook with more than 10,000 dollars in the account.
Joong-Won sits face to face with a man who owns land that he needs to build a golf course. The man tells Joong-Won that his deceased wife does not want him to sell the land. Joong-Won doesn't believe in ghosts and ignores him. He pulls out a contract which the man's children already signed. Joong-Won is able to get the man's signature.
On his way back from that meeting, Joong-Won is driven by his assistant (Choi Jung-Woo). The driver then sees a woman thumbing for a ride. Joong-Won tells his driver to ignore the woman, but a light suddenly shines on them and the car stops. At this time, Kong-Sil hops into the car and thanks them for picking her up. Kong-Sil unintentionally touches Joong-Won and feels something unusual. Later, the car pulls over at a highway rest stop. While walking back to the car, Joong-Won sees Kong-Sil talking to someone, but there isn't anyone else there. Thinking she might be crazy, Joong-Won turns around, but Kong-Sil grabs his arm. She discovers that whenever she touches him, the ghosts around her disappear.
Back at her rooftop room, Kong-Sil is terrified by the ghosts around her as usual. She thinks back to Joong-Won and how the ghosts disappeared when she touched him. Kong-Sil decides to go Kingdom shopping mall to meet Joong-Won again.
Cha Yoon Hee is a successful TV drama producer, who has been afraid of having in-laws, specifically a mother-in-law. Because of this, Yoon Hee has decided to look for a guy who isn't closely connected to his family, and if she couldn't find such a guy, she was planning on staying single.
Finally, Yoon Hee meets Terry, a doctor with a sweet personality who has no recollections of his real parents and was adopted by a couple in America as a young child. Yoon Hee's marriage life seems all set. But her marital bliss is shattered when her husband finds his birth parents and they happen to be her next-door neighbors with whom she bickers on a daily basis, and feature not one, but three sisters-in-law, and the usual array of aunts and in-laws.