Love for the same woman threatens the lifelong friendship of two 1930s Shanghai gangsters....

【There are brutal, violent, and criminal behaviors depicted in the show. Viewer discretion is strongly advised.】Flawless crime techniques, a serial murder case with no assassin investigated!An unsettled case forces the police to cooperate with criminals, go deep into the crime scene and play a final match with the murderer to get justice for the dead. Both heroes join hands to fight strongly, but the undercurrent of this devil’s deal is surging and it’s about to trigger another wave of an even greater deadly crisis!...