Albert is an eccentric inventor of missiles who comes under fire from his investors when his first prototype explodes. Even his sympathetic mistress has her doubts, as Albert lashes out in a verbal tirade condemning those of little faith in his genius.

Alice, a widowed Frenchwoman, goes on a vacation to Italy. Upon her return, she relates the particulars of her holiday. Within a 24-hour time frame, Alice gets on the wrong boat, winds up in Switzerland where she whiles away the hours at a casino, meets a handsome young German army deserter named Thomas, spends the night with her new acquaintance, pays his sizeable gambling debts, and helps him elude the authorities...