The Equation of Love and Death (2008)

Li Mi is a cab driver who has been trying to find her fiance, Fang Wen, since he disappeared when her parents broke off their pending marriage. Qiu Shui Tian is a small-time crook from the countryside who comes to the big city with hopes of getting his hands on some booty to take home with him and finding his true love. Lastly, Fei Fei is a recovering drug addict who hasfound support in her lover and business partner, Ma Bing. A mysterious death and its subsequent investigation suddenly intertwine the lives of these characters, gradually revealing the bizarre connection between them.