Judy sat staring out of the railway carriage window. Of course there was a war on, but could any train that was trying at all really dawdle the way this one was doing? On the way to her new munitions work in the village of Pinlock, Judy Rest meets handsome, dynamic Nick Parsons, who turns out (after the two engage in some extremely careless talk) to be engaged in top secret work at the same factory. Nick warns her about suspicious goings-on...