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 14-year-old is accused of killing a toy maker, Inspector Reid must delve into the violent world of child gangs.
Chief Inspector Frederick Abberline is worried that 'Jack' has started a fresh killing spree when a young woman is found in the same state as the previous victims.