On the first anniversary of his wife's death, a wealthy movie producer (James Coburn) hosts a party aboard his yacht for a group of entertainment industry insiders who may be connected with the accident that claimed his wife's life. Featuring an all-star ensemble cast, this twisty whodunit (written by actor Anthony Perkins and Broadway composer Stephen Sondheim) is a sly and mischievous send-up of superheated mysteries.