A mother of four daughters and the president of a kimchi factory decides to embark on a grand marriage scheme for her children... by having them cohabitate with four eligible bachelors.

"If Tomorrow Comes" is about the love and conflict between a mother and daughter. Seo Woo takes on the role of kind-hearted college girl Eun-chae, who thinks respecting your parents brings you happiness. The mother role will be played by Ko Doo-sim.

Lee Min Jung is a the daughter of a chaebol family, however, their financial status declines and they are forced to move in with their longtime chauffeur's (Choi Bool Am) family. The once rich and spoiled daughter must learn how to adapt and live as a commoner.

Kang Tae Joo is an ordinary employee in a department store. Shin Joon Hyuk’s mind was hurt due to his family's problems but he has a nice appearance and superior ability. They both fall in love with the heroine, Han Eun Soo, at the same time. Cha Hye Lin is the daughter of a rich shopping mall CEO and she is an aspring fashion designer who has unique tastes and an elegant appearance. Although she is independent, strong, and spoiled, she is hopelss and careless in front of love. After she was betrayed by her first love, Hye Lin stops believing in true love. She then starts to 'buy' herself new boyfriends by paying them money and forcing them to sign contracts.

One of these men turns out to be Kang Tae Joo and during their contract relationship, Hye Lin begins to fall deeply in love again. She will be entangled in a love triangle with Tae Joo and Eun Soo, who is Tae Joo's real girlfriend.