"The Lost Mon-ki" is the story of an adolescent lowland gorilla who believes everyone should wait on him hand and foot while he loafs and naps. When the time comes to move to a new settlement, his cousin, Ndeko, warns him to stay with the troop, a warning Mon-ki is unable to heed. After a leopard attacks the troop, Mon-ki is separated and isolated, throwing him into a great adventure to find his way to his new home.