Dr. Jim Hanlon, devoted to saving African animals from extinction, unknowingly hires poacher Alec Burnett as his guide in seeking to capture two white rhinos to help propagate the rare species. Burnett, who has also been hired by a black marketeer to capture the animals, is certain that his task will be simplified by Hanlon's tranquilizer guns, and he steals the zoologist's car and equipment. Burnett's girl friend, nurse Edith Arleigh, is anxious to reform him and divulges his hiding place. The two men clash, but Burnett changes his attitude when he is bitten by a cobra and Hanlon saves his life. Later, the two rhinos are captured, and the former enemies decide to join forces in animal research.