Newlyweds John and Jennifer Grogan are contemplating parenthood. In an experiment to see whether they are ready to raise a family, they adopt labrador puppy Marley, who instantly proves to be a menace to society. As the years go by, and the Grogan's experiment turns into real children, will Marley's mischievous ways land her back in the dog house, or will she prove to be an indispensable part of the family unit, in this tale of love, life and a labrador?
