The one from the execution room

After breaking up with her boyfriend, Lucie decides to leave everything behind and move to a former executioner's house in the middle of nowhere near the border. In the surrounding forests, she soon discovers an abandoned mansion that draws her in with its gloominess, and she begins to be haunted by disturbing dreams of a woman in a black dress.
Not only does the terrifying spectre appear to her, but it also enters her body uninvited, causing dramatic fragments from the life of Countess Celestýna, who once lived in the mansion, to play out before Lucie's eyes. While investigating the mysterious woman's fate, Lucie grows close to her descendant, Petr, who has his own carefully guarded secret. The more Lucie uncovers, the greater the danger she is in.