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 narrow alley. One day Six's son, Xiaobo, is abducted by some spoiled punks after he scratches their precious Ferrari. Mr. Six realizes that he must do whatever it takes to get his son back — even if that means returning to the life he thought he had left behind.

The film tells the story of a girl raised by a giant snake in the jungle of No Man's Land who happens to meet Lin Cheng, a young scientist developing a scientific research project. In the mad pursuit of profit by the plutocratic group, the secrets of the giant snake and the girl are gradually revealed and an elaborate conspiracy emerges.