Cards on the table.

It was the match-up of the century: four sleuths--Superintendent Battle of Scotland Yard; Mrs. Ariadne Oliver, famed writer of detective stories; Col. Race of His Majesty's Secret Service; and the incomparable Hercule Poirot - invited to play bridge with four specially invited guests, each of whom had gotten away with murder! But before the first rubber was completed, the host was dead.