Joe E. Brown has his air-conditioning business blown up by Nazis. With the press egging him on, he tries to enlist, but is rejected. When he goes bowling for the first time, he's terrible, but an inventor with a radio-controlled bowling ball...
There's a lot of situations going on in this comedy, but a lot of it has faded over the years. Brown is in subdued mode a lot of the time, and he also plays his own grandmother. Marguerite Chapman plays the love interest, Claire Dodd and Lloyd Bridges are spies, clearly intended to capitalize on its star's fading appeal, this movie would not earn him any new ones.