Harry is amazed when an old friend of his whom he had assumed to be dead turns up in London. The man's 'death' was actually staged and is linked to a complicated and lucrative insurance fraud. This, in turn, leads Harry and Caroline to Venice, where the man is killed, this time for real. He has, however, left behind a letter which the Protectors must understand to scupper the deadly scam.
—don @ minifie-1