Full moons are always trouble for Hain Private Investigations. And when there's a blue moon, that often means two supernatural crises to solve.

Graduate student Tiffani Heathson studies creepypasta magical rituals. When she performs one promising her a dance with her ideal lover, a careless mistake unleashes the dark side of dark romance.

When amateur ghost hunters investigate the abandoned mining town of Coal Creek, a young girl's ghost attaches herself to Adam Gallard. When he tries to communicate with her through a Ouija board, the fiend Zozo takes an opportunity to manifest and seek revenge on Sam Hain for her victory in Ireland.

As war looms on multiple fronts, will Sam's skill, intuition, and newly acquired magical powers be enough to protect her clients, or will her defeat come with the rise of the blue moon?