United States Federal agent Rigby travels to the Central American island Carlotta to investigate a stolen aircraft engines smuggling racket.

Poor Red Jones gets fired from every job he tries. His fiancée gives him one last chance to make good when he becomes a Fuller Brush man. His awkward attempts at sales are further complicated when one of his customers is murdered and he becomes the prime suspect.

Returning G.I. Curt Norton (Ken Curtis), owner of a radio station, finds his father Amos (Guy Kibbee) has allowed the station to run down and has squandered Curt's money in bad investments in war-surplus material. Eddie Jackson (Robert Kellard), who owns the rival station, is also attracted to Curt's sweetheart Jean White (Joan Barton). When Curt and the Hoosier Hotshots successfully stage an auction to raise money, Eddie hires Mimi Carston (Claudia Drake) to claim that Curt married her in France.