18-year-old Rosie Kaplan O'Grady was found as an abandoned baby by O'Grady, an Irish policeman, and Kaplan, a Jewish pawnbroker, and raised by them as their own. She is being courted by two men; prizefighter Terry Callahan and a rich socialite, Tommy Sinclair and has to choose between them.
Jim Gordon, the son of a proud and loving father, enters the University of California as a student. There he meets Mary Ward, a campus coed who captures his heart on the first day. He becomes close friends with Larry Powell, his roommate, but incurs the wrath of Kenneth Slade, who is unable to take a practical joke. Jim and Larry attend a campus dance with Bessie and Phyllis, two vamps, and through a series of romantic complications Jim tries to convince Mary of his love for her.
Dee is a naive chorus girl living in a boarding house full of low-paid actors. Dee and Billy are in love and he helps her to move from chorus girl to star. Things run afoul when jealousy, misunderstandings and sleazy men enter the picture.