Captain Mainwaring decides to enlist women to the platoon to assist with the war effort. After initial interviews go rather less than satisfactory, a Mrs. Fiona Grey walks into his office and into his life. Mainwaring is flattered that Fiona not only has similar views to him about the war, but also is complementary about his persona. He finds himself falling in love, unfortunately the men very quickly realise and start to gossip behind his back and Fiona decides to leave, but can Mainwaring get to the station in time to stop her?