The Captive Heart 1946 After the evacuation at Dunkirk, June 1940, some thousands of British prisoners are sent to German P O W camps One such group includes Capt Geoffrey Mitchell, a concentration camp escapee who assumed the identity of a dead British officer To avoid exposure, Mitchell must correspond with the dead mans estranged wife Celia But eventual exposure seems certain, and the men must find a way to get him out If he reaches England, though, what will his reception be