Embittered after serving time for a burglary he did not commit, Joe Bell is soon back in jail, on a prison farm. His love for the foreman's daughter leads to a fight between them, leading to the older man's death due to a weak heart. Joe and Mabel go on the run as he thinks no-one would believe a nobody like him.

China Valdes joins the Cuban underground after her brother is killed by the chief of the secret police, Ariete. She meets and falls in love with American expatriate Tony Fenner. Tony develops a plan to tunnel under the city's cemetery to a plot owned by a high official, assassinate him, and blow up the whole Cuban hierarchy at the ensuing state funeral. Together with a band of dedicated revolutionaries, they begin digging.

In the American oilfields, a fugitive from justice's destiny is intertwined with the fortunes and the misfortunes of a small oil company that hires him as a roughneck.

Imprisoned during the Spanish Civil War, John "Kit" McKittrick is released when a New York City policeman pulls some strings. Upon returning to America, McKittrick hears that a friend has committed suicide, and he begins to smell a rat. During his investigation, McKittrick questions three beautiful women, one of whom has a tie to his refugee past. Pursued by Nazi operatives, McKittrick learns of the death of another friend, and begins to suspect the dark Dr. Skaas.