Many years ago Mr. Six was a notorious gangster. That was back when there was still such a thing as honour among thieves, when criminals earned respect and maintained principles. These days Mr. Six is all but forgotten, a living relic residing in a hutong, or narrow alley. One day Six's son, Xiaobo, is abducted by some spoiled punks after scratching their precious Ferrari. Mr. Six, who has been diagnosed with a serious heart condition, realizes that he must do whatever it takes to get his son back and forge a meaningful bond with him while there is still time â?? even if that means returning to the life he thought he had left behind.