A young woman, Judith Moray (Jean Simmons), deserts her prospective fiance, the nice doctor Alan Kearn (James Donald), for an old flame - the dashing former wing commander Bill Glennan (David Farrar). Glennan soon gets her pregnant and marries her, then quickly leaves when he learns he's unable to gain financial security from her father. Years later Judith finds out Glennan has died and goes back to Kearn, and they bring up her child together. Suddenly, Glennan reappears in their lives again ready to cause havoc.