A couple manages to quit smoking by using hypnosis, but then their children decide to use it to manipulate their parents into more submissive behavior.

"Cheaper by the Dozen", based on the real-life story of the Gilbreth family, follows them from Providence, Rhode Island, to Montclair, New Jersey, and details the amusing anecdotes found in large families.

The accidental mix-up of four identical plaid overnight bags leads to a series of increasingly wild and wacky situations.