Billionaire Wan Guoli invited Chen Zhijie (played by Lau Ching Wan), who was once an elite in the police force, to protect his only daughter Jennifer (played by Gigi Leung). Since Jennifer doesn't like people spying on her, Zhijie must pretend to be Mario, a Filipino male servant who serves Jennifer, in order to get a generous reward. In the process of getting along with Jennifer, Zhijie found that she was a very simple girl, with no friends around her, all of whom came for her money, and she was extravagant every day. Therefore, her father Wan Guoli decided to deceive his daughter by saying that she was seriously ill and bankrupt, so that she could learn to be independent and renew herself. When Jennifer first moved to the community where the general grassroots lived, she was very uncomfortable. When she was trapped in life and needed to do everything herself, she found out that it was not easy for her father to start from scratch. She vowed to cure her seriously ill father and work hard to make money. She and Mario shared hardships and had a deep relationship with each other. When she realized that everything was a good deception, she also faced her feelings for Zhijie.