A kidnapping gives Reid the opportunity to recover recent events and re-build his team, when tackling a white slave gang. However, a secret from his past comes back to haunt him.
The murder of a brilliant engineer is discovered, just as a shipping magnate arrives in London to acquire a failing English company.
When a Jewish anarchist is killed during a strike at the docks, Reid's team are called in to investigate.
When a 14-year-old is accused of killing a toy maker, Inspector Reid must delve into the violent world of child gangs.
Lewis and Hathaway investigate the murder of a baby-sitter, and uncover a swingers' network. The detectives must establish whether the girl's fate is connected to her time spent in a children's home, or whether she was an unintended victim.
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Wealthy businessman Rex Fortescue collapses and dies in his office. It is determined that he was poisoned, and a handful of rye is found in his pockets. No one seems too upset, as everyone agrees that Rex was a tyrant. Soon, however, Rex's young wife also ends up poisoned. The maid, Gladys, whom Miss Marple trained, writes to her asking for help. Miss Marple arrives too late, as Gladys' body is found strangled. Miss Marple senses a connection between the deaths and a well-known nursery rhyme, "Sing a Song of Sixpence". Now it is up to her to find the cold-blooded killer and to deliver justice.
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