Four more adventures featuring Agatha Christie's light-hearted 1920s sleuthing duo, Tommy and Tuppence Beresford (James Warwick and Francesca Annis). In 'Finessing the King' Tommy and Tuppence come across a personal ad and decide to crack the code only to find themselves mixed up in a murder case. In 'The Ambassador's Boots' the duo are asked by the US Ambassador to Britain to look into something that happened to his luggage whilst on a journey in the country. In 'The Man in the Mist' a beautiful actress, Gilda Glen, sends a note to Tommy asking for his help and to meet her. However, when the Beresfords go to the meeting place they find Gilda dead... In 'The Unbreakable Alibi' the duo are asked to help a wealthy man win a bet with a beautiful art journalist - if he wins he will marry her, if he loses he will never see her again.