When Varela undertakes responsibility for a jazz group debuting in England, he soon finds himself with more than he bargained for. It isn't long before the band are serenading a group of spies to save the life of a musician.
Finding himself in trouble in Greece, Jarrell, a wartime colleague of Varela's, sends his ex-comrade a prearranged distress signal: a campaign ribbon and a torn half of a document — the two items that spell 'danger'.