Sloane and Rowan are rival murderers, each with a taste for hunting serial killers. From West Virginia to California, Boston to Texas, they engage in an annual game of death and danger. When they form an unlikely friendship that blossoms into romance, the consequences of their actions and the spirits of their victims threaten to engulf them. Facing the most perilous creatures, the country has to offer, their game of grave digging may lead them to be matched by death itself.