Animal doctors fight to protect the wildlife of Africa.

Dr. Marsh Tracy and his teenaged daughter, Paula, are working in an African game preserve when a harmless lion begins to wander through the villages, frightening the natives. Dr. Tracy traps the lion, examines him, and discovers that the cross-eyed animal cannot see well enough to hunt. Paula names the lion Clarence, and the two become great friends. Paula's British tutor, Rupert Rowbotham, is terrified of Clarence and the other animals on the preserve--Doris the chimpanzee and Mary Lou the python. Meanwhile, Dr. Tracy has become romantically interested in Julie Harper, an anthropologist studying gorillas in a nearby rain forest. When the news arrives that rebel terrorists are heading for the rain forest to capture gorillas to trade for weapons, Dr. Tracy rushes to the camp to save Julie; but both are captured. Rowbotham, fleeing the preserve in fear of the animals, drives into the scene, not knowing that Clarence has hidden in the back seat of his car. Clarence helps defeat the terrorists and save Dr. Tracy and Paula.