When someone is leaking information from the American Embassy in Vienna, Drake is called in to investigate when the finger of guilt points to the Ambassador.

When a young, beautiful refugee pleads for political asylum, Drake is called in to investigate by his superior, Hardy. When the girl's sister arrives, Drake has a double problem to solve.

Hardy assigns Drake to fly to the Middle East to find Vanessa Stewart, a beautiful girl wanted for espionage. Posing as a Baltic agent, Drake persuades her to accompany him before the British find her. A subplot comments drily on the ethics of espionage.

When twenty five million dollars in forged currency floods the European capitals, John Drake is assigned by U.S. Intelligence to trace the source. The trail leads to an ex-Nazi General staying at a lake-side hotel in the mountains. Drake faces death before he can solve the case and uncover the secret of the lake.