It is 1940 and Mr Graham, a quietly-spoken engineer and arms expert, has just finished high-level talks with the Turkish government. And now somebody wants him dead. The previous night three shots were fired at him as he stepped into his hotel room, so, terrified, he escapes in secret on a passenger steamer from Istanbul. As he journeys home — alongside, among others, an entrancing French dancer, an unkempt trader, a mysterious German doctor and a small, brutal man in a crumpled suit — he enters a nightmarish world where friend and foe are indistinguishable. Graham can try to run, but he may not be able to hide for much longer!

Josef Vadassy, a Hungarian refugee and language teacher living in France, is enjoying his first break for years in a small hotel on the Riviera. But when he takes his holiday photographs to be developed at a local chemists, he suddenly finds himself mistaken for a Gestapo agent and a charge of espionage is levelled at him. To prove himself innocent to the French police, he must discover which one of his fellow guests at his pension is the real spy. As he desperately tries to uncover the true culprit's identity, Vadassy must risk his job, his safety and everything he holds dear.

English crime novelist Charles Latimer is travelling in Istanbul when he makes the acquaintance of Turkish police inspector Colonel Haki. It is from him that he first hears of the mysterious Dimitrios — an infamous master criminal, long wanted by the law, whose body has just been fished out of the Bosphorus. Fascinated by the story, Latimer decides to retrace Dimitrios' steps across Europe to gather material for a new book. But, as he gradually discovers more about his subject's shadowy history, fascination tips over into obsession. And, in entering Dimitrios' criminal underworld, Latimer realizes that his own life may be on the line.

Kenton's career as a journalist depends on his facility with languages, his knowledge of European politics and his quick judgement. Where his judgement sometimes fails him, however, is in his personal life. When he travels to Nuremberg to investigate a story about a top-level meeting of Nazi officials, he inadvertently finds himself on a train bound for Austria after a bad night of gambling. Stranded with no money, Kenton jumps at the chance to earn a fee helping a refugee smuggle securities across the border. Yet he soon discovers that the documents he holds have far more than cash value — and that they could cost him his life!