
Cribb is called in when doubt emerges over the guilt of a murderess due to hang shortly.

After a young woman discovers a body floating in the Thames, Cribb and Thackeray search for the killers—noting similarities to the recently published 'Three Men in a Boat'.

After a series of accidents to performers, Cribb and Thackeray enter the music hall scene where they uncover the existence of late-night secret performances for wealthy spectators.

When headless male corpses are found floating in the river, the common link is scarred hands, which points to participation in illegal bare-knuckle boxing.

A key player in London's vice world is found dead in one of his own brothels. An unreliable witness with a score to settle claims to know the murderer but wants to make a deal with the police.

The Pedestrian Championship of the World is taking place in London, and Cribb and Thackeray are on hand to prevent foul play between the various competitors.