Leonardo DiCaprio, Microsoft’s Paul Allen, and Netflix are bringing Africa’s elephant poaching crisis to wide public attention. The Ivory Game, a feature-length documentary being released on November 4, lays bare the dark underworld of the ivory trade, responsible for the slaughter of more than 30,000 elephants, and numerous park rangers, every year. From Africa to Asia and back again, the film traces the flow of illegal ivory from the time a whole family of elephants is found butchered in Kenya to a shop in China selling intricately carved tusks for hundreds of thousands of dollars.

And there’s Hongxiang Huang, a part-time wildlife investigator and former journalist based in Nairobi. As we accompany Huang on several undercover operations, we learn