Fighting for his life and the right to see his son again, Frank Kittridge was forced to kill. Left alone on a Martian base, he decides to make a deal with the corporation that sent him to his death. Frank knows that for them he is a “macaque,” but for the opportunity to return to Earth, he is ready to endure and transform into Overseer Brack to meet the NASA astronauts. But an unexpected discovery threatens not only the return home, but also Frank’s very existence - he is not the only person on Mars.