This is the epic story of three women who embarked on lifelong journeys to study and protect humanity’s closest living relatives: the great apes. Jane Goodall, who left England to live with the chimpanzees of Tanzania and became one of the most famous scientists of our time; American Dian Fossey, who championed the mountain gorillas of Rwanda and, though she met a tragic end, made her cause legendary; and Canadian Biruté Galdikas, who went into the deepest jungles of Borneo to live among the orangutans. They came to be known as the Trimates, and were celebrated in National Geographic features and in films. Their collective work served to open the world’s eyes to the wonder of the great apes, the crisis of their disappearing rainforest habitats and the state of the planet as a whole. They also became powerful role models for a generation of young women inspired to follow their lead as students, scientists and passionate defenders of our primate relatives. This documentary not only tells the story of the pioneering generation, but follows the adventures of three young women who were inspired by the Trimates to make the same choice to live with the great apes of Africa and Borneo.