A haunted trail of bodies. A K-9 who senses what humans can't. A force no one dares name Officer Delilah Hart thought she'd seen everything-until her new partner, Echo, sniffs out something truly unnatural. The murders are brutal, ritualistic, and invisible to traditional forensics. As the team digs deeper, Delilah is pulled into a hidden world of cultists and shadowy magic linked to a secret from her own past.
But the deeper she dives, the more dangerous the truth becomes-and only Echo can protect her from what's lurking just out of sight.