The underage Rosemarie is still too young to run her inherited farm by herself; but she's more than aware that her foster father and the farm's administrator, the farmer Schlieker, is constantly skimming from the farm's finances to line his own pocket.
After losing a coveted role in an upcoming film to another actress, screen queen Mona Marshall (Lola Lane) protests by refusing to appear at her current movie's premiere.
Herr Werther, a new magistrate to the Grand Duchy of Walheim who is a violinist and poet, seems to have fate on his side as he meets and pursues a beautiful local woman, Charlotte.
Three mice run, cavort, sing and dance around in the stores and restaurants a big city at night. They wind up in a café for an early-morning snack and stocking up on food provisions before they return to the safety of their den beneath a man-hole cover in the street.
In an effort to impress Darla, Alfalfa tells her that he's a famous bear trainer. Little does he know that Darla's father owns a circus - and a bear costume.