Up Goes Maisie

Up Goes Maisie is a 1946 Amercican comedy film produced by MetroGoldwynMayer as the ninth of ten films starring Ann Sothern as exshowgirl Maisie Ravier. In this series entry, Maisie goes to work for an inventor played by George Murphy.

Morton suspects Maisie is an industrial spy when he learns of her deception, but she convinces him she was merely trying to avoid romantic trouble. He assures her she will have no such difficulty with him. He is thrilled to learn that she worked during the war helping assemble the very bombers he himself flew, and introduces her to his men World War II crew mates Mitch OHara Murray Alper and Bill Stuart Lewis Howard, and college friend Tim Kingsby Stephen McNally. Then he sets her to work not only in the office, but also at welding and other assembly tasks. Eventually, Maisie and Morton fall in love and become engaged.Unbeknownst to Morton, Kingsby, Nuboult and Nuboults daughter Barbara Hillary Brooke are scheming to steal his invention. When Maisie notices that they are being billed for twice as many parts the plotters are building a second copy of the prototype, Barbara invites her to a Sunday social at an exclusive club, where she spikes her drink. Maisie ends up diving into the pool with her clothes on. Feeling she is no good for Morton, Maisie goes into hiding. ........

Source: Wikipedia