Cambridge and St. Jacques star as Harlem plainclothes detectives Grave Digger Jones and Coffin Ed Johnson in this successful mix of crime and comedy. They're investigating a suspicious preacher's back-to-Africa scheme which they suspect is a swindle. Directorial debut of Davis. Filmed on location in Harlem, New York. Based on the novel by Chester Himes. Followed by a weak sequel, "Come Back, Charleston Blue."