Sparkling Cyanide

Six people sit down to a sumptuous meal at a table laid for seven. A sprig of rosemary -- 'rosemary for remembrance' -- marks the empty place. It is the first anniversary of the horrific death by cyanide-laced champagne of the beautiful and troublesome Rosemary Barton. The assembled guests are the same participants at the meal a year prior, and Rosemary's widower, George Barton, is determined to prove that one of them is a murderer. But George's dinner party, and his plans for justice, will go terribly awry, as another death will come to haunt this date.