Whilst the volunteers are trained, Stewart and Cartwright travel covertly to Goa. By a mixture of blackmail and bribery, they arrange diversions on the night of the raid. A party is to be held in the Governor's palace, a brothel will offer free entry to sailors from ships in the port and a Carnival with fireworks will be held. Stewart has a brief affair with Mrs. Cromwell, a mysterious and socially well-connected woman, who turns out to be a German agent and the main conduit to the German 'Master Spy', known to the Germans and the British by the code-name "Trompeta" (Trumpet). She is eventually killed by Stewart, after she attempts to kill him but not before she's killed Jack Cartwright.