Manfred's investigates a possibly kidnapped scientist takes him to a reactivated, but top secret Royal Navy station on a small island off Scotland. Though an MP, he's refused entry. He sneaks in, locating the missing man, in an old shed.
A young boy with no home, who has worked aboard a tramp freighter, escapes the ship and it's vicious captain. He is arrested for theft. Manfred works to clear him and find a way for him to stay in England.
A list of former Nazis and Nazi sympathizers who, are obtaining high government positions in Germany, is turned over to Manfred. The list may be phony.
Manfred is called to the estate of Lord Eastleigh for a deathbed confession: the Rembrandt painting hanging in his home is an original. It had been stolen from the museum and replaced with a copy. The lord wants Manfred to return the painting as quietly as possible.
A plane which crashed five years earlier is spotted by a hunter in Canada. Jeff is visited by the late pilot's wife. She wants him to get to the wreckage first to see if a half-million dollars of embezzled gold was aboard the aircraft.
After a young man working on a new multimillion-Lira dam project tells Poccari of some of the dangerously inferior cement being used, he has a mysterious fatal accident. So Poccari goes to investigate.
A young woman, an opponent to the dictatorship in Guatarica, is murdered in London. The killer may be hiding in the embassy protected by diplomatic immunity.