When Natan, a lost scholar, stumbles into the strange and treacherous Underworld, he finds himself in the company of an unlikely ally—a sardonic, undead thief named Senob. Bound to a realm where the laws of reality are strange and getting stranger, the two must navigate perilous landscapes, deadly pursuers, and the mysterious forces that govern this upside-down world. With nothing but Senob's dubious guidance, Natan faces a question as haunting as the Underworld itself: Is escape even possible, or will he become another forgotten soul who has fallen off the Edge of the World?