The eldest of three sisters protects their Fifth Avenue mansion from a developer she once married.

During WWII, when an allied bomber is shot down over Germany, the five surviving crew are captured but cleverly escape detention after learning German secret information and knocking out a Nazi major. With the angry major in hot pursuit, aided by military personnel, Gestapo agents and Hitler-loyal citizens, the five wend their way across perilous Germany, intent on reaching the UK with the secrets they have learned.