A seemingly wholesome and benevolent family, the Parkers have always kept to themselves, and for good reason. Behind closed doors, patriarch Frank rules his family with a rigorous fervor, determined to keep his ancestral customs intact at any cost. As a torrential rainstorm moves into the area, tragedy strikes and his daughters Iris and Rose are forced to assume responsibilities that extend beyond those of a typical family. As the unrelenting downpour continues to flood their small town, the local authorities begin to uncover clues that bring them closer to the secret that the Parkers have held closely for so many years.

From the Oscar-winning team behind MAN ON WIRE comes the story of Nim, the chimpanzee who in the 1970s became the focus of a landmark experiment which aimed to show that an ape could learn to communicate with language if raised and nurtured like a human child. Following Nim's extraordinary journey through human society, and the enduring impact he makes on the people he meets along the way, the film is an unflinching and unsentimental biography of an animal we tried to make human. What we learn about his true nature - and indeed our own - is comic, revealing and profoundly unsettling.