With extinction imminent, researchers visit an exclusive national park to observe one of the last troops of bonobo chimpanzees. Amid unusual behaviour and unexplained deaths, Shel Murray suspects her team is being hunted. Back at home, Shel's partner is attacked touring their new property. Amnesiac and quarantined, John is visited by an inscrutable doctor. While recovering, he begins to questions not only the assault, but the renewed marks on his...