Federal agent Rigby (Robert Taylor) travels to a Central American island to investigate stolen war surplus. Suspicion falls on veteran Tugwell Hintten (John Hodiak) and his alluring singer wife, Elizabeth (Ava Gardner). But Rigby's situation gets more complicated when he starts an affair with Elizabeth. The brains of the scam -- J.J. Bealer (Charles Laughton) and Carwood (Vincent Price) -- offer the lawman a bribe. When he refuses it, both lovers' lives are jeopardized.