No one is immune from mistakes, and mobile agents of the Official Service are no exception. But the cost of some mistakes is often higher than you might imagine. As a result of a quarrel that occurred between It and Fiddler after the breakup of the family, both officials find themselves in the world of Terra-zero. In a world that cannot exist even theoretically. In a world that has absorbed several clusters of the Global Network. In a world where Control is dying... The situation on the planet is catastrophic - the very fact of the existence of Terra-zero threatens big problems for the entire inhabited universe. I just don’t want to leave this world. Because for some it is a place to die, and for others it is the best place on earth...