A mismatched team of British Special Services agents led by an American must infiltrate, in disguise, a female-run Enigma factory in Berlin and bring back the decoding device that will end the war.

Medical student Paula Henning wins a place at an exclusive Heidelberg medical school. When the body of a young man she met on the train turns up on her dissection table, she begins to investigate the mysterious circumstances surrounding his death, and uncovers a gruesome conspiracy perpetrated by an Antihippocratic secret society operating within the school.