British youth Albie Paterson accidentally witnesses a gangland deal and is thus drawn into a conflict with the gang leader Hunter Cameron. He and the Italian woman Eliza Duncan and the old policeman Henry Dubois start an investigation, but encounter a dead end. Fortunately, with the help of the wealthy German businessman Alfred von Stein, they go to Nice to follow up on the clues. In Nice, Albie reunites with his old friend private investigator Liam O'Connor, and the four of them work together to locate Hunter's money laundering base. However, the operation is fraught with danger, and they decide to continue looking for other evidence to expose Hunter's criminal organisation.