Lucy Church, the sole witness to a fatal robbery, is struck by a passing bus and her life lies in the balance as the thieves wait for a chance to finish her off.

In wartime, a young officer is killed during a raid to kill a German general at the house that used to belong to his grandmother. Before he dies he talks about a treasure that was hidden there. Several years later, the members of that group are still together as a street band living in a cellar. The last of the gang, who was chosen for his skills as a ruthless killer, escapes from prison in a rampage of killing and, obsessed with the treasure, takes the gang to France to recover it.

Miss Marple believes she's seen a murder in a passing-by train, yet when the police find no evidence she decides to investigate it on her own.

In Britain, a man with a shady past uses his antiquities shop as a front for smuggled diamonds but his young shop-assistant starts blackmailing him, leading to murder and to a police investigation.