A motorist witnesses a woman falling or jumping from a tenement building. Police arrive on the scene and find a crucifix and a small metal container (a pyx). While investigating the death, a detective in the city of Montreal enters the world of prostitution, drug addiction, Conspiracy (crime), and the occult. As the investigation continues, it is revealed that the dead woman is Elizabeth Lucy, a prostitute and Opioid dependence. Suspects in Elizabeth's death are soon murdered one by one, and evidence of occult ritual begins to surface, leading to a confrontation with a cult leader who may be possessed by Satan himself.