Rookie journalist Vivian interviews Frederick, caretaker of an ancient cemetery, who recounts two stories linked by a dark secret. In the present, gangster Jimmie Levinson accuses his former partner Paul Pattuchi of theft, orders the murder of Paul’s girlfriend, and is later drawn into a deadly confrontation over a mysterious relic. In the Middle Ages, ruthless inquisitors hunt a renegade priest to uncover the secret of the Eternal Heart, which promises immortality.