A rookie cop teams up with a former detective with a supernatural gift to hunt down a serial killer.

Mainlander & financial analyst Cheng Zixin (Gao Yuan-Yuan), who followed her then boyfriend Owen (Terence Yin) to Hong Kong, runs into her ex-boyfriend while riding the bus. Owen is now with his pregnant wife and when his wife spots Owen talking to his ex she she freaks out. Cheng hurriedly gets off the bus and, being in a daze, is almost run over by a car. A haggard drunk named Fang (Daniel Wu) then saves Cheng. Meanwhile, in a nearby car, sits CEO Cheung Shen (Louis Koo) who watches everything that transpires. CEO Cheung Shen is a playboy who also works in an office building directly adjacent to Cheng Zixin. Cheung Shen soon starts to woo Cheng Zixin by sending messages to her through the window of his office building. The drunk haggard Fang, who saved Cheng Zixin’s life, runs into Cheng Zixin a few weeks later. It turns out that the drunk haggard is a Canadian-born top architect going through personal problems. They soon become friends.

Andy is a legendary Mahjong player. Years ago Andy’s passion for Mahjong cost his family their entire fortune, his brother Louis then turned against him. Thus now Louis suffers from economy downturn. Andy offers to take care of him and their aging mother. Meanwhile, Louis is being trapped by a job interview supervisor and her cons, Sean. Andy revenged Sean by beating him at the game table. Gigi, Andy’s ex-flame, is increasing disappointment in Andy’s rejection, she wishes he’ll never win at the Mahjong table again. Oddly, Gigi’s words come true….

Wah and Kinki both working at the same department of a computer company. Both of them are not getting on very well initially, but friendship develops when they get to know each other after a while. When Wah starts to realize his emergent fondness for Kinki, his ex-girlfriend reappears and plans to gain back his affection. In addition, he notices that his ex-girlfriend arranges a guy to pair up with Kinki. At the same time, his supervisor would like to lay him off at work.