This clever whodunit, written by horror legend Anthony Perkins and famous composer Stephen Sondheim, is a mischevious look at Hollywood insiders. Six seemingly unconnected individuals are invited to spend a weekend on the yacht of a wealthy movie producer (James Coburn). When murder occurs, they suddenly realize that they were all present at the deadly hit-and-run accident of James's wife, Sheila, a year earlier. Mayhem ensues as the hunt for the killer becomes more and more complicated.