When twentysomething Jacqueline Swanson mysteriously goes missing in Las Vegas, supernatural crime investigator Quentin Draith is hired to investigate. Determined, Draith immerses himself in the darkest corners of the city's underworld, unveiling a string secrets and bizarre deaths.

The deeper he digs, the more otherworldly his assignment gets. Assassins, human and otherwise, put a target on Draith's head. An old foe ignites a storm of mad science. And a ravenous beast rampages through the city.

The clues point Draith to Sin City's infamous "Bone Triangle," a neighborhood marked for its dark happenings and disappearances. And when Draith finds that the daughter's disappearance may be linked to an alien plot against the city, he goes all in to make a final high-stakes play to save the city he loves.