Woo Shin-hye is a divorcee who lives with her mother and two beautiful, airhead daughters. They are filthy rich thanks to their beauty salon. Yeol Suk-hwan is a widowed single father to a poor but hardworking family. He lives with his mother-in-law and three children—two sons and a smart but homely daughter.

Shin-hye and Suk-hwan unexpectedly fall in love and marry. Now that the two families live under the same roof, conflicts constantly arise due to differences in personality. But they eventually become a real family.