In a future world where days are short and the nights seem like forever, Rex Fear works the slums of the last human metropolis on Earth as a Tracer—a mix between a private eye and finder of lost souls. Outside the high walls of Golgotha mega-city trillions of demonic fiends, evolved from once harmless bacteria in the long nights, rule the rest of the planet, ever trying to get inside and devour the remains of mankind.