Hayley, an advertising creative director, climbed from the bottom to an international company with her strength. Three years ago, she had a one-night stand with Leon, her most dangerous and charming competitor, and accidentally got pregnant. However, she was deeply hurt by his words "I don’t need relationships to drag down my career", left alone and gave birth to a daughter. Three years later, she returns to New York with her daughter, determined to win the biggest client of the year to turn her life around. But due to the client’s requirement of a "married project leader", the company arranges a six-month fake marriage between her and Leon, who is now the group vice president. In the contractual marriage, they play a perfect couple in front of clients and bicker with each other at home. Leon gradually suspects the little girl’s identity and discovers Hayley’s forbearance back then. With workplace rivals sowing discord and past misunderstandings emerging, their relationship goes through twists and turns. Finally, Leon learns to respect, Hayley lets go of her guard, and they abandon the contractual disguise to form a real family on an equal footing, giving their daughter a complete home.
