In a lavishly-decorated nightclub in 1938 Paris, couples dance the syncopated rhythms of Latin America: Rumba, Cucaracha, Tango, and also the Foxtrot, Charleston, and Boston. Among beautiful women, local pimps and Mussolini's spies brush against each other on the dance floor and in the streets. A police inspector is charged with a difficult task: to clean up the city streets, just when bodies start falling as the Mafia and the spies set deadly traps for each other.