To the tranquil town of River's End comes the scourge of Professor Kenneth Parker, physical culturist, who presents himself as an authority on health. Dr. Paul Christian becomes alarmed at Parker's promises of dramatic weight loss, but Mrs. Browning, the head of the women's club, is charmed by Parker and invites him into her home and offers the women's club as his forum. As the professor preaches stringent diet as the road to self-satisfaction, Dr. Christian warns against wholesale dieting, advising instead of weight loss programs tailored to the individual. Parker not only disrupts the eating routines of the women of River's End, but he also disrupts the Brownings' family life as Mrs. Browning argues with her husband over the professor's intrusion, and their daughter Kitty places herself on a starvation diet to please the professor's assistant, Bill Ferris. When Kitty collapses from starvation, the doctor, enraged, accuses Parker of being a charlatan, but his denunciation goes unheeded. As Kitty's condition worsens, Dr. Christian, on the verge of exhaustion from a strenuous work schedule, drags himself to her bedside. Discovering that Parker has been prescribing benzedrine to his patients, the doctor finally unmasks the cultist as a danger to the community. Bill, realizing his boss's treachery, quits his job and goes to Kitty, and a blood transfusion from Bill saves the girl's life. The town returns to health with the expulsion of the quack, and all ends happily as Bill and Kitty are married.