Something terrible has broken free from the ground during excavations of a labyrinth discovered beneath the Staronova synagogue. It moves, covering its path with corpses. A team of paranormal researchers is the only force that can stop this creature—though, inside their small group, things are already falling apart, and their group leader Voytěch and the doctor Alexandra, who have been happily married up to the moment they met, are bound not only by professional ties. All of this entangles an already complicated situation, and the chances of success are rapidly fading…