Following an argument with his young protege, the curmudgeonly Dr. Gillespie dumps Jimmy Kildare in a street clinic, hoping to teach him a lesson. While working there Kildare meets pretty nurse Mary Lamont, and ends up treating a hoodlum with a gunshot wound. He purposely fails to write a report on it, and soon finds himself in a heap of trouble. Who else would come to his rescue but good old Dr. Gillespie?

Kildare tries brain surgery, advised by Dr. Gillespie, and faces a rival for nurse Lamont.

Intern Kildare heals a millionaire's daughter and tricks Dr. Gillespie into taking a vacation.