Choripán is a dog that yearns for freedom, manages to escape from his home and runs away from his master. In another place, outside the city, a cow is sold. His chicken friend tries to avoid being taken away and chases her until he reaches the city where he loses track of her. Donato is now alone in a dizzying city, and a girl insists on adopting him as a pet. Choripán and Donato finally find themselves in the same situation, on the run. Donato decides to protect Choripán from the dangers that the place holds, including a gang of children who like to torture animals.