Le siège de l'âme (1997)

This Canadian science-fiction film takes place at the beginning of the 20th Century in an unnamed city where eager Jules is a member of a scientific team researching the secrets of immortality. The scientists uncover a buried pyramid containing an embalmed body with a heartbeat -- but minus a soul. Heading into the city at night, Jules hopes to locate the soul. He encounters Sophie who seems to have some answers to the mystery.