The arrival of the Jones family's first grandchild causes an uproar when the baby's mother, Bonnie Thompson, insists upon rearing her child according to the precepts of child psychologist Dr. Ronald B. Pillcoff. The enforcer of the doctor's edicts is Nurse Cordell, a live-in nurse who makes certain that no one disturbs or handles the baby, as outlined by Dr. Pillcoff. This causes the baby's desperate father Herbert to sneak through a window to hold his daughter and inadvertently trigger a kidnapping alarm that brings the police. In retaliation, Herbert joins the other Pillcoff baby fathers to form an anti-Pillcoff society. After the society's first meeting, Herbert returns home to demand his rights as a father, only to be thrown out of the house by his wife. This prompts Bonnie's grandmother, Granny Jones, to pay a visit to their family doctor, where she learns that Pillcoff has been expelled by the medical association for unethical conduct. Granny approaches Herbert with her information, and they convene a meeting of the anti-Pillcoff society to hatch a plot that will rid the town of Maryville of Pillcoff's edicts forever. When Dick Lane, the secretary of the Chamber of Commerce, invites Pillcoff to give a lecture, the greedy doctor eagerly accepts the large fee and arrives at the hall to find it filled with unruly children. As Pillcoff is reduced to a screaming match with the children, Bonnie's housekeeper, Hattie, a mother of eight herself, orders Nurse Cordell out of the house. Meanwhile, back at the lecture hall, Pillcoff threatens to beat Bonnie's brother Bobby, which finally makes Bonnie realize that he is a quack. The theories of Dr. Pillcoff are thus banished forever, and peace is restored to the families of Maryville.
