Growing up in an extremely well-off family, Jennifer (Gigi Leung) has no proper value over money and nor any concern over the feelings of other people. Her deep pocket father thus hires ex-cop Kit (Sean Lau) to protect Jennifer while she is made go broke and survive on her own in Sham Shui Po, a Hong Kong's old community crushed with shabby housing. Pretending to be the wealthy girl's Filipino driver Mario, Kit assists Jennifer to struggle in the slums to make a living. As Jennifer finds Mario the one to count on in her bad times, Mario also begins to admire her. But after all Mario is Kit's fake identity. Should Kit/ Mario reveal to Jennifer who he really is?