Kai Donovan has always had sharp teeth. Earning his keep as an underground fighter in South Boston, he revels in well-earned notoriety. Wild. Irreverent. Vicious. His secret: he's the monster from a fable. But when Kai loses a match against a mysterious opponent whose ferocity rivals his own, he finds himself beholden to the underworld. What he owes isn't money, but the recovery of an elusive prize coveted by the city's most dangerous criminals. His partner Miya--burdened with the ability to traverse dreams--spends her days investigating supernatural phenomena. When she receives a shadowy proposal to find a missing teenager, she's confronted with the possibility that another like her exists. As Kai and Miya chase ghosts, the threads of their pursuits weave into a menacing tapestry. Kai's dark past returns to haunt him, threatening the bonds he believed to be ironclad. Unhealed wounds fester as he's faced with a ruinous choice: unravel his blood-soaked history or lose himself and the life he's scavenged together. Bare your teeth. The nightmares are at your door. Contains mature themes.