Given the question: Build a movie plot around this: Who opens the door, when barking is heard outside? The Nanny.
The answer is:
Songwriter Roger Radcliffe lives in a bachelor flat in London, along with his dalmatian, Pongo. Bored with bachelor life, Pongo decides to find a wife for Roger and a mate for himself. While watching various female dog-human pairs out the window, he spots the perfect one, a woman named Anita and her female dalmatian, Perdita. He quickly gets Roger out of the house and drags him through the park to arrange a meeting. He and Anita fall in love and get married.[6]Later, Perdita gives birth to a litter of fifteen puppies. That same night, they are visited by Cruella De Vil, a wealthy former schoolmate of Anita's. She offers to buy the entire litter, but Roger says they are not for sale. A few weeks later, she hires her henchmen, Jasper and Horace, to steal them. When Scotland Yard is unable to find them, Pongo and Perdita use the "Twilight bark", a canine gossip line, to ask for help from the other dogs in London.Colonel, an old sheepdog, along with his compatriots Captain, a gray horse, and Sergeant Tibbs, a tabby cat, find the puppies in a place called Hell Hall (Cruella's abandoned and dilapidated family estate, also known as The De Vil Place), along with many other dalmatian puppies that she had bought from various dog stores. When Tibbs learns they are going to be made into dog-skin fur coats, Colonel quickly sends word back to London. Upon receiving the message, Pongo and Perdita leave town to retrieve their puppies. Winter has come, and they have to cross the Stour River which is running fast and laden with slabs of broken ice. Meanwhile, Tibbs overhears Cruella ordering Jasper and Horace to kill the puppies that night out of fear the police will soon find them. In response, Tibbs attempts to rescue them while Jasper and Horace are preoccupied watching television, but they finish their show and come for them before he can get them out of the house. Pongo and Perdita break in and confront Jasper and Horace just as they are about to kill the puppies. While the adult dogs attack them, Colonel and Tibbs...