When Sach (Huntz Hall) is hit on the nose by Herbie (Rudy Lee), Sach develops a mystic-mind power. This prompts Slip (Leo Gorcey), Chcuk (David Gorcey as David Condon), Butch (Bennie Bartlett)and Louie (Bernard Gorcey) to buy the Eagle Eye Detective Agency...using, of course, Louie's money.
In waltzes Myra Hagen (Joyce Holden), who leaves with the boys a valuable fur coat and a sealed letter, to be given to the District Attorney, in the event anything happens to her. John Graham (William Forrest), makes his entrance following Myra's exit, and he poses as an insurance man, but is actually with the fur crooks, and he is given the coat but the Boys are unable to produce the letter, inasmuch as Sach, has wrecked the office by blowing up the safe, and the latter has vanished.
But, in the event it shows up, Professor Damon (Robert Osterloh), leader of the gang and operating a Health Farm as a cover, has his henchmen "Soapy" (William Phillips) and Al (Gil Perkins, whom some source evidently doesn't know and has him tagged 'unconfirmed')kidnap Herbie as a ransom against the delivery of the letter, which blows the lid on the gang.
Slip, disguised as a Viennese doctor, and Sach, as an invalid old woman wearing Mary Pickford curls, go the the Farm to rescue Myra---understandable---and Herbie.