George Stark, a wealthy industrialist and playboy, gathers a group of bourgeois friends at his isolated island beach house for the weekend. His guest of honor is Gerry Farrell, a brilliant chemist who has discovered a remarkable new formula. Farrell doesn't care to discuss business, but the businessmen in attendance are determined to talk money--in the millions. Each of them angers the others with secrets bids and back alley deals, spawning an atmosphere of distrust, exacerbated by the sexual intrigue in the air between the men and their various wives and mistresses. Suspicions begin to rise when the guests begin to turn up dead, one by one! Mario Bava strikes again--and again, and again--in this stylish and wicked whodunit, never before released in America!
