Jang Joon Ha is a man out for vengeance. In one day, Joon Ha lost the two most important people in his life. His brother, Young Ha, was wrongly convicted of a crime that he did not commit. The woman that he loved was murdered and his brother was the prime suspect. Joon Ha, an attorney, sets out to prove that someone else committed the crime.

Jin Joo is a half Korean and Vietnamese girl who marries a Korean man, Kang Jun Woo, in order to come to Korea to look for her biological father who abandoned her. The drama is not only about her searching for her dad but also about the cultural differences between her and her husband's family. There is bad blood between the two families, Kim and Kang. The rivalry is even more fueled since Ji Young is still in love with her ex-boyfriend, Jun Woo, even though she is married to Young Min. Kang Sae Mi is Jun Woo's sister and Kim Young Soo is Young Min's younger brother. They want to get married but both families oppose their marriage which leads to the two young lovers living together and expecting a baby out of wedlock. Kang Won Mi is the thoughtless, old maid elder sister of Jun Woo.