Famed detective Hercule Poirot joins forces with three other noted sleuths when a murder is committed right under their noses. The wealthy, intelligent and extremely mysterious Shaitana has a special fascination with crime and decides to set a trap for a secret murderer to strike again. Poirot arrives for dinner and card games at Shaitana's sumptuous apartment to find his fellow guests include crime writer Mrs Ariadne Oliver, Superintendent Wheeler of Scotland Yard and the Foreign Office's Colonel Hughes. They are joined by an ill-matched group of players - who, unknown to them, have been invited because Shaitana suspects one of them is a killer.