On the frontlines of the world's national parks are selfless committed park rangers who face the prospect of death from poachers, wildlife and the dangerous yet beautiful environments. Filmmaker and ranger Sean Willmore follows the work of park rangers in over 6 continents and 19 countries. Among volcanoes, ascents by horseback in Chile and Argentina, a charging elephant in South Africa, drowning rivers in Costa Rica, mountain gorilla protection in volatile Virungas - Uganda, helicopter rescues in the Rockies, and dangerous anti-poaching patrols and chases in South Africa, Galapagos, Uganda and India - he exposes the exciting yet daily challenges to preserving our world . Here’s a way to learn about a career!