After a traffic accident solely involving a taxi in New York City, the Jane Doe taxi passenger is brought into the hospital, she who is physically all right but who is suffering from retrograde amnesia from the accident. She is assigned under the care of Dr. Michael Lewis, an intern at the hospital, as he is doing research on such amnesia cases. It isn't until a Mr. Goodwin comes to the hospital claiming that she is his daughter Jane that she remembers who she is and the situation: Jane Greystone working for British Intelligence, she who was in the process of being kidnapped by the taxi driver as she has information on the location of British war ships that the Nazis are trying to obtain. She figures the taxi driver and Mr. Goodwin are working for the Nazis. She has to try and convince Mike of who she is and that both their lives are in danger, especially as she requires his help in getting out of this predicament. Mike is torn in believing her and thinking she having an overactive imagination due to the trauma, which is only complicated when Goodwin brings in his own medical specialist, Dr. Ingersoll, who just happens to be Mike's former mentor, but who just happens to be working for the Nazis. Mike's primary concern is Jane's well being, especially as he starts to fall for her, as they get into greater danger at the hands of among others Dr. Ingersoll.