Dead Reckoning (1990) (1990)

A doctor, accompanied by his wife and her lover, embarks on a sailing trip aboard his yacht. When a violent storm forces them to abandon their cruise, they seek shelter on a desolate island. Stranded, tensions escalate into a lethal game as the wife and her lover plot to eliminate the unsuspecting husband. As the island's isolation intensifies their rivalry, survival turns into a harrowing struggle for power and betrayal, testing the limits of trust and loyalty among the trio.