As conceived, Monogram's On the Spot was meant to be purely a Frankie Darro vehicle, with black comedian Mantan Moreland as comedy relief. As filmed, however, On the Spot offered Darro and Moreland as costars, contributing equally to the film's plotline and entertainment value. The story shifts into gear when a mysterious stranger shows up in the small-town drugstore manned by soda jerk Frankie (Darro), then promptly expires after leaving an important message with Frankie and his assistant Jefferson (Moreland). Gangster Smiling Bill (Leroy Mason) shows up soon afterward, demanding that Frankie and Jefferson turn over the message-only to be knocked off himself by a mysterious assailant. Doing a bit of detective work on their own, our heroes discover that the double murder was linked with a recent bank heist, masteminded by?.well, best not to give away the surprisie ending. Former "Our Gang" star Mary Kornman provides the love interest, but the largest female role, that of a big-city insurance investigator, is essayed by Maxine Leslie.