In 1950s London, aspiring songwriter Roger Radcliffe lives in a bachelor flat with his pet Dalmatian, Pongo. Deciding both of them need a "mate", Pongo watches women and their dogs in the street. Noticing a young woman named Anita and her Dalmatian Perdita, he drags Roger to a park to arrange a meeting. Despite a tumultuous first encounter, Roger and Anita fall in love, and soon marry, with Pongo and Perdita attending...