Tang Ren and Qin Feng travel to Japan to investigate the death of a mafia head. As they suspect foul play, they engage in a battle of wits against foreign detectives.

The four constables Emotionless, Iron Hands , Life Snatcher and ColdBlood are specially skilled in their own individual super powers. When the four constables of the Divine Constabulary investigate a murder in the suburbs, they unexpectedly stumble on clues to the murder of Emotionless's family 15 years ago.