Lee Suman and his wife Misun can not have children. Therefore, Suman brings home a little Hyukjae, but 3 years later, Misun unexpectedly gives birth to Donghae. Suman - the rich and the famous businessman in South Korea. He believes in the preservation of traditions, and against marriage for love. When Hyukjae returned home after studying in London, he meets Sooyeon and falls in love with her. Meanwhile, Donghae meets Miyoung, younger sister Sooyeon.