The story follows the exhausting investigation of New York City detectives Eddie Egan and Sonny Grosso as they attempt to uncover the participants in the major drug deal. Acting on a hunch, the detectives begin surveillance on Pasquale "Patsy" Fuca, who was observed in a nightclub consorting with known criminals. It soon becomes apparent that Fuca is involved in a large drug trafficking operation, including two Frenchmen: Jean Jehan, the main person responsible for importing the heroin shipment to the United States, and Jacques Angelvin, a television personality.