Les lèvres rouges (1971)

dir. Harry Kümel Two days after getting married in Switzerland, Valerie and Stefan Chilton travel by train to take a boat to England to visit Stefan's mother at the Chilton Manor. However, the train has to stop in Ostend and the couple lodges in the royal suite at a seaside hotel. The concierge, Pierre, advises that the place is empty since it is out of season, and they become aware of three murders in Bruges. On the same night, the Hungarian Countess Elizabeth Báthory arrives in the hotel with her secretary Ilona Harczy and Pierre swears that she had been in the hotel forty years ago with the same appearance. When Valerie and Stefan cross paths with the mysterious countess, danger looms in the horizon. Meanwhile, a retired detective snoops at the hotel suspecting that the countess may be the serial-killer that drains the blood of the victims to use as elixir of youth.