MOTHER SUPERIOR (German: MATER SUPERIOR, formerly DIE PFÖRTNERIN) is a horror-fantasy-thriller.
1975, Rosenkreuz Manor.
Sigrun starts a new position with the eccentric Baroness Heidenreich. A shared longing binds them together: the old lady’s memory contains the secret to Sigrun's true identity; the nurse’s life force holds the key to the future for the Baroness. On the path to self-discovery, Sigrun is confronted with the sinister world of "folkish" occultism, opening an unearthly abyss in which every moral and principle is tested.