While Colonel Kingston-Bruce is trying to talk Betts into putting money into his ailing company, Mrs Betts's valuable pink pearl is stolen. Tommy rushes off to Scotland Yard with the finger-prints of the thief, but will they crack the case?

Lois Hargreaves, of Thurley Grange, calls in Tommy and Tuppence to investigate the poisoning of a box of chocolates with arsenic.

Murder is afoot when Captain Cecil is found dead on a golf course. Have the police arrested an innocent man for murder? Tommy and Tuppence set out to find the real killer.

A clergyman's daughter calls in Tommy and Tuppence to investigate some bizarre and frightening events at an English country house. Is a poltergeist haunting a country rectory?

Tuppence is curious about a cryptic message in a newspaper's personal column, suggesting a romantic rendezvous. Testing her theory, she talks Tommy into attending the Three Arts Ball, and later they visit the cafe which seems to be the meeting point.

Tommy and Tuppence take a case involving luggage belonging to the U.S. ambassador.