Still recovering from the case of a serial killer spirit in Lyme-Regis, Kester is immediately confronted with his girlfriend’s disappearance. After he manages to free her from the cult holding her captive, the agency enjoys a series of easy cases.

However, the agency are soon confronted with an even greater threat than any they’ve faced before: the reckless cult that held Kester’s girlfriend hostage is conspiring with an ancient and powerful Daemon to open a permanent spirit door. Having just witnessed the lethal consequences uncontrolled spirits can have on the unsuspecting, the agency joins forces with several agencies to stop the reckless cult from unleashing chaos and ending the world’s fragile protection from dangerous spirits.