A puppy, Minnow, remembers his life born in a tenement in a high-rise block of flats. He is befriended by an old lame dog, Rufus, a wise campaigner who introduces his young companion to city life and daring escapades for morsels and nourishment.
During a fearful chase the two dogs are parted: both are transported separately to a Home for Strays, a business operation run by money grabbing, untrustworthy individuals. Minnow, an attractive puppy, is purchased for the daughter of a wicked witch like woman, Mrs Cowper.
The spoilt child soon tires of her new pet and her mother, who rules the family, takes a strong dislike to the now, unpopular puppy.