When a frightening wave of violence sweeps through New York City, troubled cop Sarchie fails to find a rational explanation for the bizarre crimes. However, his eyes are opened to a frightening alternate reality when renegade Jesuit priest Mendoza convinces him that demonic possession may be to blame for the gruesome murders. Together, they wage a valiant supernatural struggle to rid the city of an otherworldly evil. New York police officer Ralph Sarchie investigates a series of crimes. He joins forces with an unconventional priest, schooled in the rites of exorcism, to combat the possessions that are terrorizing their city.