Fighting for life and the right to see his son again, Frank Kittridge was forced to kill. Left alone at the Martian base, he decides to conclude 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 reincarnate as overseer Brack to meet NASA astronauts. But the unexpected discovery threatens not only the return home, but also Frank's very existence - he is not the only person on Mars.