This drama is about a family living on the outskirts of Seoul, held together by the hard-working patriarch and his wife. However, this father has been hiding his true identity for thirty-five years, and now all his children have grown up and are about to get married. His wife is a responsible mother to their three daughters and one son, but she is full of love for him. Suddenly, one day, a young man turns up at the house and claims to be the family’s son. Although he knows that this young man is not his biological son, the father takes him in and insists that he is his real son. Ahn Joong Hee is an actor who used to be a member of an idol group. One day, he turns up at the home of this family, consisting of Byun Han Soo and Na Yeong Shil and their four children: Byun Mi Young (Jung So Min), Byun Hye Young (Lee Yoo Ri), Byun Joon Young (Min Jin Woong) and Byun Ra Yeong (Ryu Hwa Young). Joong Hee begins living with them.