Viscount Clint de la Roche, a playboy insurance detective vacationing in Spain with his assistant, Billette, is called to Paris to investigate a $2 million bank robbery. Also taken in the robbery was a large quantity of opium stored in safe deposit boxes by Ricco Barone, a deported New Jersey gangster. The Viscount discovers that shortly before the robbery the bank president had spent a weekend with a stripteaser, Tania, who has since been murdered. The Viscount visits her roommate, Lili, and confirms his suspicions that the man responsible for the robbery is Tania's lover, international thief Marco Demoigne. Eventually, Barone contacts the Viscount in an attempt to recover the opium. With the cooperation of the American and French narcotics bureaus, the Viscount arranges a meeting between the rival gangs of Barone and Marco. The encounter explodes into violence as the two leaders attempt to double-cross each other, and all the gangsters are either gunned down or arrested. The Viscount collects his reward money and resumes his vacation--this time with Lili.