Un flic is a 1972 crime film directed and written by Jean-Pierre Melville. The film is about a Parisian nightclub owner named Simon who leads four men to carry out on a bank robbery. One is seriously wounded and taken to a clinic. Fearing the police will locate him, Simon sends his mistress Cathy to kill him. Cathy's lover, Commissaire Édouard Coleman learns from an informer that a large quantity of drugs are being transported by the Paris-Lisbon train and intends to intercept it.