For humans, darkness is menacing, forbidding, petrifying. It conceals the most dangerous and terrifying creatures on Earth, but it also holds some of the greatest, undiscovered mysteries of nature. Most animals are nocturnal, but they're seldom studied at night and rarely filmed in the dark. The Dark follows a team of wildlife experts on a mission to solve those wildlife mysteries. Braving the jungles and swamps of South America during the night, the team sheds light on previously unobserved creatures and strange behaviours, offering a totally new perspective on our wild planet.