To save her family, Xia Wanyang agrees to a marriage contract with the wife of the richest man and marries Qi Muye, Shanghai's number one playboy. Within a year, she must help him inherit the family business. She thinks he is genuinely useless, but in reality, he has been pretending for years to expose a traitor within his family. The two spar with each other in a battle of wits and courage throughout their contractual marriage, unaware that Qi Muye is actually Ye Huo, the bone marrow donor she has been desperately searching for over the years. As family conspiracies, a wrongful case involving a sporting competition, and a series of schemes by their enemies unfold, the two join forces to fight back, and their feelings gradually deepen. In the end, the truth comes to light, the wrongful case is overturned, and the villains are brought to justice. She also discovers that the man sleeping beside her is the very person she has always held dear in her heart.