The Key(2007)

Original title: La Clef

Lately, Eric Vincent—an unremarkable man in his thirties—has been gripped by a profound sense of unease. Is it the fear of having a child, or the sudden, unsettling resurgence of the ghost of a father he never knew? One morning, a stranger calls to offer him the ashes of that very father. Though initially reluctant, he eventually agrees—only to find himself plunged into the heart of a diabolical scheme.