Seeking to crack down on organised crime, Milner goes undercover in the building business, which leads Foyle's team to possible racketeering at the Talbot Shipyard. Assistant Commissioner Rose directs Foyle to investigate communist leader Raymond Carter, who is in Hastings with his fiancée, who is Rose's daughter, the painter Lucinda Sheridan. Carter rebukes Foyle for his inquiry, and Sheridan goes on to explain his commitment to the People's Convention. The story then follows a bomb disposal unit composed of Royal Engineers Captain Hammond, Jack Archer, and Ernest Jones, who are called to the shipyard, and find a cache of money which they steal. Foyle later learns from a shop steward and union agitator, Derek Woodgate, that only 200 people work at the yard, whereas the Talbot brothers have been receiving wages for 400. Later, the body of Jones is found, killed by the Talbots' henchmen, and Hammond decides to booby trap a suitcase, ending up killing himself and the Talbot brothers. The money is then returned to the government.
