The Prince's Voyage

When an old monkey Prince named Laurent runs aground on an unknown shore, he is found, injured and lost, by 12-year-old Tom. Prince Laurent is then taken in by Tom's parents, a couple of scientists who were banished from their community because they believe in the existence of other monkey civilizations. With Tom's help, the Prince discovers a society he knows nothing about, while Tom's parents decide to use him to prove that their theory was indeed correct