Demons of the Mind

A reclusive Baron keeps his teenage children, Elizabeth and Emil, locked up and drugged, fearing they inherited a congenital curse from their insane mother. The siblings develop an incestuous attraction and struggle to escape their aunt's control. Meanwhile, local women are murdered, and a priest tries to uncover the evil. Two outsiders arrive: a scientist seeking to cure the children and a man trying to rescue Elizabeth. As the body count rises, the true source of the evil becomes clear.