After the first encounter with the Labyrinth, only one person manages to stay alive. The hero finds himself on the planet from which the invasion of Earth originated. And since during his passage through the Labyrinth he was thrown several years back in time, he gets a real chance to prevent the invasion. But to do this he will have to descend into the Labyrinth again and visit not only the astonishing planet inhabited by two warring races, one descended from chiropterans and the other from amphibians, but also a virtual world created by the Labyrinth within itself.