First part in four part series based on the book by William Allison and John Fairley about the true-life figure of Percy Toplis, who led a British army mutiny during the First World War.

Parcy Toplis arrives at the Etaples training camp in northern France, where the soldiers are put through a brutal training regime, under the command of Brigadier General Thomson. There is a mutiny of the troops.

Percy Toplis takes charge of negotiations between the mutineers and Brigadier Thomson. When the mutiny is over, Toplis and the other leaders become marked men. Toplis escapes to England using his talents for disguise, and meets and falls in love with Dorothy.

The war is over and Toplis decides to rejoin the Army under a false name. He is recognized by a fellow mutineer and joins a black market racket. A shooting incident is blamed on Toplis and the police are back on his trail.