Struggling with trauma, Malcolm has stopped attending therapy. He reluctantly seeks help from his father and a fellow inmate, Friar Pete , a serial killer who targeted victims based on religious delusions.

A priest is found murdered in his church, his body hanging upside down in a ritualistic display.

Hebrew text at the scene references "Abaddon the Destroyer". The killer used precise surgical methods found in a 1517 medical text, the Field Guide to Surgery .