Dottie works in a munitions factory as a WAC, while her fiancé Joe is stationed in the Pacific. A colonel visits Dottie to convince her to resume posing for cartoonist Milton, and that "Poison Ivy" is the patriotic boost the troops really need. She agrees and then sees a newsreel with footage of Joe declaring that he wishes to spend a night with "Poison Ivy"—the fictional sex bomb he doesn't realize is actually his fiancée. Dottie travels to the front on a publicity tour, and destiny brings her—and her desire for revenge—face-to-face with the unwitting Joe.