When composer George Harvey Bone wakes with no memory of the previous night and a bloody knife in his pocket, he worries that he has committed a crime. On the advice of Dr. Middleton, Bone agrees to relax, going to a music performance by singer Netta Longdon. Riveted by Netta, Bone agrees to write songs for her rather than his own concerto. However, Bone soon grows jealous of Netta and worries about controlling himself during his spells.
An Englishman kills a German look-alike and poses as a Nazi spy in London.
In 1940 England, aristocratic Prudence Cathaway alarms her snobbish parents by joining the WAF service branch. She soon meets and falls in love with the brooding Clive Briggs, despite his prejudice against the upper classes, and agrees to spend a week with him at a Dover hotel. When Clive's soldier friend, Monty, arrives to retrieve him, Prudence learns that Clive went AWOL after Dunkirk, and urges him to recall why England must fight the war.
A fake general sends two sailors on a wild-goose chase for buried treasure.