Raised voices at a Bel-Air party. The front door bursts open. Sheila runs from the mansion, away from her irate husband, Clinton Greene (James Coburn). A screech of brakes beyond the driveway. Sheila is hit and dies.
One year later to the day, Greene invites six Hollywood insiders (played by Raquel Welch, James Mason, Dyan Cannon, Richard Benjamin, Joan Hackett and Ian McShane) who were present that fatal night aboard his yacht, the Sheila, anchored off Nice, France, for a "murder game" devised to reveal his guest's innermost secrets... a game that proceeds to an inexorable and surprising climax.