A successful corporate designer with a privileged life yearns for simplicity until fate intervenes. Her path crosses with a grief-stricken surgeon seeking vengeance after a devastating loss.

Eun Sung, the daughter of Dong Gu and Chun Young, dreams of becoming successful, but she is an actress that nobody knows. It has been more than three years since she joined the theater with an ambitious dream, but she still has to put up posters and clean the theater and only gets to practice when the other actors are not around. Sun Woo, the son of Jung Ae and Ki Seok, is a promising Hollywood film director who always achieves his goal. Eun Sung and Sun Woo fall in love with each other and decide to get married. However, they realize Dong Gu and Jung Ae were sworn enemies who divorced 30 years ago. This ill-fated relationship between parents and children fights over their marriage. The story of how people who hate each other the most become the wildest, weirdest, yet hilarious family begins now!

Despite her lack of wealth, Seo Yeon is a well-known woman for her warm heart. One day, she learns that the man she calls her father, Kang Baek San, turns out to be her biological parents' sworn enemy. Tae Poong is Baek San's eldest son. Ever since the death of his younger sister, he spends time in the US while having conflicts with his father. San Deul is a gentleman who works hard at LeBlanc to repay Baek San's kindness. Although Tae Poong's sister Ba Da shows affection toward San Deul, he still has feelings for his first love, Ba Ram. But as he meets Seo Yeon, he feels a warm breeze in his heart. With the truth uncovered, Seo Yeon's vengeance will begin.

Gemma, who cannot forgive her mother for abandoning her for her greed, love, and success, starts her never-ending revenge filled with contempt. Meanwhile, Ki Seok lives day to day believing that there is no such thing as love in the world after having experienced an immense betrayal in his past. However, even after meeting Gemma, who naturally pulls him in, he rejects her unknowingly due to the wounds left in his heart. Hyun Seok, who is unlike his older brother Ki Seok and has a free-spirited mind, falls instantly for Gemma's charms. The lives of these three characters start to intertwine. Will they be able to get what they each desire?