After a while, with the parrot's help, the Doctor got to learn the language of the animals so well that he could talk to them himself and understand everything they said.

John Dolittle is a highly respected doctor in the village of Puddleby-on-the-Marsh, yet he loves animals so much that his house is soon full of them. With all his patients scared away, and the expense of feeding his menagerie mounting, a friend suggests that the Doctor become a vet instead.

With the help of Polynesia the parrot, Doctor Dolittle swiftly learns the language of the animals so that he can talk to all of his new patients.

However, when a message comes from Africa, telling of a terrible sickness among the monkeys there, the Doctor and his animal friends depart on a thrilling and dangerous adventure that they are never likely to forget.