When a corpse turns up, shot by Maigret's stolen gun, his search for the killer takes him to London to investigate one murder - and prevent another.

A pickpocket helps himself to Maigret's wallet and which then leads him to a complicated case of murder.

When a man's headless body is pulled from the Canal Saint Martin, Maigret and his colleagues are puzzled. In a chance encounter at a local cafe Maigret uncovers the truth behind this disturbing murder in an intriguing story of an estranged family, adulterous affairs and a secret inheritance.

On his travels through the U.S., Maigret stops in Tucson, Arizona at the guidance of his FBI friend Harry Cole, who leaves him one day to observe a coroners inquest. The body being examined is that of Bessie Mitchell, a young girl who died under suspicious circumstances-- she spent a night drinking and driving with five young Air Force men and was found the next morning on the tracks, run over by a train. Maigret quickly becomes engrossed in the hearing...