John Starkweather feels restless. Though still technically an agent for SPECTR, his only job now seems to be hanging out with his boyfriends, Caleb and the vampire spirit Gray, and binge-watching TV in their New Orleans apartment. The inactivity comes to an abrupt end when a rougarou attacks John’s estranged grandfather. Even though he hasn’t seen his family since he was a teen, John can’t pass up the opportunity to reconnect.

Parapsychologist Dr. Nigel Taylor doesn’t work with psychic mediums. Until, that is, a round of budget cuts threatens his job and an eccentric old woman offers him a great deal of grant money. The only catch: He must investigate a haunted house with a man she believes to have a true gift.

Caleb has spent the last six months adjusting to life possessed by the vampire spirit Gray and hunting demons with their boyfriend, federal exorcist John Starkweather. Unfortunately, the other agents of SPECTR view Caleb and Gray as a ticking time bomb. Their frustration mounts as the new district chief puts more and more restrictions on them. John wants to help, but he has problems of his own. Charleston is in the grip of an outbreak of demon possession, and the human members of SPECTR have been pushed to the brink.

What happens when an exorcist falls in love with the demon he's supposed to destroy? Unregistered paranormal Caleb Jansen only wants a normal life. But when the demon-hunting spirit Gray accidentally possesses him, Caleb finds himself in a countdown for his very existence.

Repressed scholar Percival Endicott Whyborne has two skills: reading dead languages and hiding in his office at the Ladysmith Museum. After the tragic death of the friend he secretly loved, he's ruthlessly suppressed any desire for another man. So when handsome ex-Pinkerton Griffin Flaherty approaches him to translate a mysterious book, Whyborne wants to finish the job and get rid of the detective as quickly as possible. Griffin left the Pinkertons following the death of his partner, hoping to start a new life. But the powerful cult that murdered Glenn has taken root in Widdershins, and only the spells in the book can stop them.