In a haunting and gothic mansion of 19th-century Europe, a young professor arrives to investigate the mysterious death of his mentor, a prominent physician who was found under chilling circumstances. His journey leads him to uncover a dark secret surrounding his deceased friend's family, a web of madness, betrayal, and revenge that intertwines with the legacy of science and superstition.
As he explores the mansion, he encounters a disturbing pendulum swinging with a sinister rhythm and a fearsome serpent, a symbol of the danger lurking not only in the place but also in the shadows of the mind. As he delves deeper into the family's secrets, he realizes that the members are trapped in a cycle of poor decisions and ancient fears, leading to terrifying revelations and a sense of fatalism.
Tensions rise when the professor discovers that he is not only at the center of a murder mystery but that he himself has become the next target. Caught between reason and madness, he must unravel the truth before the pendulum marks its final beat. With a blend of psychological horror and a grim atmosphere, this unsettling tale tests the limits of sanity and loyalty, leading the viewer to an unexpected ending that will leave an indelible mark.