Africa's elephants are being killed for a market that keeps growing faster than any ban can stop it. Reporter Rageh Omaar follows the ivory trail from poaching grounds in central Africa to buyers in China, working undercover with camera crews from the BBC's Natural History Unit. In northern Kenya, one region has lost a quarter of its elephant population in three years, and Omaar visits an orphanage caring for calves whose mothers were shot for their tusks. He gets access to Interpol's largest ivory operation to date, tracking dealers and smuggling networks across two continents, and confronts buyers in China, now the world's largest market for illegal ivory despite a 23-year international ban on the trade. The film cites the highest volume of large ivory seizures in over two decades, evidence that the crackdown is failing even as demand rises in the Far East. The question running through the reporting is blunt: whether the African elephant can survive in the parts of the continent hit hardest by poaching.