Sara (Marjorie Main) has trouble keeping her struggling circus going, even more trouble arrives when her niece Penny (Charlene Wyatt) arrives to live with her. However her niece grows up into a fine young woman (Anne Nagel) who might be the best trapeze artist in the world!
Although to be fair her act isn't that special but Sara says so and she isn't the kind of person to take a back seat to anyone, she rules the circus with an iron fist and also pushes Penny hard. However she does undeniably love her niece. Trouble comes with Penny's two male fellow trapeze artists Ricardo (Jack La Rue - not playing a gangster for a change) and Pablo (Grant Richards). A love triangle develops on the high wire...
Somewhat cliched but a decent story. It does have some unintentionally hilarious elements, such as when the child Penny somehow saves the circus from financial doom by burning it down by accident when she was playing with matches with a monkey, so they could claim on the insurance!