The romance between a bright woman, Mi-Poong, who defected from North Korea and a man, Jang-Go, in Seoul who is a stickler for the rules. Conflicts also arise over a 100 billion won inheritance.
Every family has its issues but what happens when the patriarch in the family is not happy with the behaviors of his children? Cha Bong Soon does not intend to just sit back and take bad treatment from his three adult children – Cha Kang Shim, Cha Kang Jae and Cha Dal Bong – and decides to take legal action against them. With such chaos going on in her family, Kang Shim has a tough time focusing on her job as secretary to the president of Daeoh Company and constantly at odds with the president's son, Moon Tae Joo, the company director. Will Tae Joo get sucked into the Cha family drama as well?
Goo Jae-hee lives in the United States and one day sees a track and field competition on TV, and becomes attracted to one of the high jump competitors, Kang Tae-joon. She begins to idolize the young athlete and eventually transfers to Korea to attend the same school that Tae-joon attends after he suffers an accident that could potentially end his career. There is a catch, however: Tae-joon attends an all-boys high school and Jae-hee must disguise herself as a boy to enter.
After his uncle's unjust takeover of the family company, Kang Min Ho grows up to be a successful, if not cynical investor who only cares about money. But when he undergoes a sudden heart transplant surgery, Min Ho literally has a change of heart when he inherits a warm and compassionate heart. In the midst of seeing the world anew, including falling for the kind Kim Soon Jung, Min Ho must mitigate his newfound personality with the demands of his cutthroat career.
Chef Seo Poong was once a star chef and worked at the best Chinese restaurant. His popularity faded and he eventually wound up working at a small, failing Chinese restaurant. Meanwhile, Doo Chil-Seong is the owner of a building. He is an ex-gang member and he was in jail for 5 yers.
Han In Sang and Seo Bom are young and in love, despite major differences in wealth and status. But all of that hangs in the balance when Han In Sang accidentally knocks up Seo Bom, setting off a comedic domino effect that reverberates throughout the snooty Han family and the modest Seo family. Between pride and humiliation, as well as love and duty, will this young couple be able to survive the storm and do what's right for their baby?
Nam Shin is a son from a family who runs a large company. After an unexpected accident, he falls into a coma. His mother Oh Ro-Ra is an authority on brain science and artificial intelligence. She creates an android named Nam Shin III which looks like just like her son Nam Shin. The android pretends to be Nam Shin and he has a bodyguard So-Bong.
Ji-Sook goes through a difficult period, due to her father's private loan. She begins living as Eun-Ha. Eun-Ha is from a wealthy family and looks like Ji-Sook. When Min-Woo was only seven years old, he became the successor of a large corporation which his family ran. Due to his position, he cannot reveal his feelings. Through his family, he meets Eun-Ha. He notices she is different from other wealthy woman that he has met. Min-Woo has feelings for her.
Ji Eun is the daughter of a wealthy chaebol family. She is bright, humorous, beautiful, and smart. Ji Eun meets Se Hoon, who runs a small furniture workshop. Unlike Ji Eun, Se Hoon comes from a poor family background. He was once the top student at a prestigious university, but he had to drop out due to his sick mother. Nevertheless, Ji Eun falls deeply in love with Se Hoon. She confesses her feelings to him. Se Hoon is also in love with Ji Eun, but he turns her down due to the extreme differences in their backgrounds. Eventually, Se Hoon is unable to bury his feelings any longer and they decide to marry.