The Leiningen South American cocoa plantation is threatened by a 2-mile-wide, 20-mile-long column of army ants.

A stranger comes to town looking for his estranged wife. He finds her running the local girls. He also finds a town and sheriff afraid of their own shadow, scared of a landowner they never see who rules through his rowdy sidekicks. The stranger is a town tamer by trade, and he accepts a $500 commission to sort things out.