During 12-year-old Wesley’s summer on a Pennsylvania farm with the Graysons, a Mennonite family, his single mother is killed back in Brooklyn. They adopt him and take him along on their missionary assignment to Africa.
When guerilla fighters murder his new family and the tribe hosting them, and take the village girls prisoner, Wesley escapes into the jungle. With his parkour skills and a remarkable ability to communicate with animals, he survives, caring for an orphaned baby elephant and a baby chimp.
Taken in by Lantoto, the son of a tribal chief, Wesley becomes part of the tribe. Together, with help from the elephant and the chimp, the boys rescue the captive girls, and Wesley returns home to use his fortune to help the planet.