Sach is the exact double of a famous French scientist who has invented a powerful rocket fuel Enemy agents, mistaking Sach for the scientist, attempt to kidnap him and get the formula for the fuel
Parting company with her on stage partner Professor Orco partly due to the job being potentially hazardous to her health, streetwise but kind hearted vaudeville performer Maisie Ravier, in Chicago, goes on a search
Gang member, Muggs, aspires to be a jockey and tries to cheat his way to the top
Candy on a toothache turns Sach into a prognosticator, which attracts the attention of an exploitative Slip and a personality switching doctor hoping to create an obedient super race
When the boys discover that Sach has a strange ability to sniff out diamonds, they hatch a scheme to make money out of it