朴贤秀是集团老板朴顺昌的长子，亲生母亲生下他就离家出走了，从此再也没有见过母亲。父亲朴顺昌是一个风流成性的生意人，从来没有给过朴贤秀温暖，让他一直很孤单，导致朴贤秀成为了一个毒舌男。朴贤秀和尤娜的结婚也是父亲指点的商业婚姻，在朴贤秀回国后尤娜毅然决然的选择离婚，随后便不知所踪。为了在三个儿子中赢得父亲的信任，朴贤秀不敢告诉父亲这个消息。在一次车祸中，朴贤秀遇到了和自己长得一模一样的女孩郑梦溪。郑梦溪是一个有珠宝设计师梦想的女孩，但是为了照顾弟弟妹妹，她只能在接头摆弄廉价的首饰小摊。朴贤秀拿出十万韩元希望郑梦溪能扮演几个小时尤娜，生活拮据的她选择答应他的请求。经过一系列啼笑皆非的事后，郑梦溪成为了梦想的设计师，朴贤秀也和尤娜重新在一起

Park Hyun Soo is the eldest son of the group boss Park Soon Chang. His biological mother ran away from home after giving birth to him, and he never saw his mother again. His father, Park Soon-chang, was a flirtatious businessman. He never gave Park Hyun-soo warmth and made him feel lonely all the time, causing Park Hyun-soo to become a vicious man. The marriage between Park Hyun Soo and Yuna was also a commercial marriage instructed by her father. After Park Hyun Soo returned to China, Yuna resolutely chose to divorce, and then disappeared. In order to win the trust of his father among the three sons, Park Hyun Soo dared not tell his father the news. In a car accident, Park Hyun Soo met Zheng Mengxi, a girl who looked exactly like him. Zheng Mengxi is a girl who dreams of being a jewelry designer, but in order to take care of her younger siblings, she can only fiddle with cheap jewelry stalls in joints. Park Hyun-soo took out 100,000 won and hoped that Jung Mong-gye could play Yuna for a few hours, but she chose to agree to his request because of her financial difficulties. After a series of ridiculous things, Zheng Mengxi became the designer of his dreams, and Park Hyun-soo and Yuna got back together again