Steed is trapped in a diabolical game when his five co-members on a wartime tribunal begin to be murdered.
The Saint, in Paris, meets a girl who is selling her family's art treasures before someone tries to steal them. Simon doubts her fear and seeks the truth.
A cut throat businessman gains the competitive edge by murdering his rivals.
Steed is spending the weekend with two of his oldest friends, Bill and Laura Bassett, who, unknown to him, are being held prisoner in their own home by the other house guests.
