Somebody is selling songs for two recording companies, simultaneously. The owner of one of them hires a detective to find out the swindler's identity. But the private-eye is clumsy, and messes things up even more.
A street vendor and a servant theater, newly unemployed, accidentally swap their briefcases trinkets for one of three bandits who just rob a bank. The chase, which also involves two "rapas" only ends when, aided by a chorus girl, unwittingly participating in a musical number of the show's theater...
