Royal Chitwan Park in southern Nepal splits into two distinct habitats, tropical deciduous forest and open floodplain grassland, and this episode of Lost Worlds tracks the animal most associated with the park: the greater one-horned Indian rhinoceros. The film follows the species through both zones, showing how its thick, plated skin and single horn set it apart from its African relatives and why it draws less attention despite being one of the largest land mammals in Asia. Poaching drives the film's central problem, with hunters targeting the horn for buyers who prize it in traditional medicine and as an aphrodisiac, pushing the species toward endangered status alongside habitat loss from the surrounding human population. Chitwan's role as a protected refuge runs through the footage, with tigers and elephants appearing as neighbors sharing the same forest and plains. The episode stays close to the rhinoceros itself, using the park's two ecosystems as the frame for watching a single threatened animal move through its remaining range in Nepal.