A newlywed couple, Stefan and Valerie, are on their honeymoon journey and find themselves at a grand, desolate hotel in off-season Ostend, Belgium. Their relationship already shows strains of secrecy and deception, particularly concerning Stefan's reluctance to introduce Valerie to his mother. Their isolation is interrupted by the arrival of a countess, Elizabeth Bathory, and her companion, Ilona. The countess is strikingly elegant and mysterious, exuding an air of aristocracy and a timeless grace, and she takes a particular interest in the young couple.

The countess's presence begins to exert an uncanny influence on Valerie and Stefan, with her attention becoming increasingly intrusive. As night falls, strange occurrences and interactions ensnare the couple in an unsettling atmosphere. Ilona also engages in enigmatic behavior, adding to the growing tension within the hotel's walls. The couple soon discovers unsavory revelations about the countess's past, and her fixation on them takes a menacing turn as their own relationship continues to unravel amidst whispers of immortality and the macabre.