There is a guest in the haunted mansion. His name is William, and he is looking for a meeting with the past, or rather, with his dead sister. He blames himself for her death and has been dreaming of asking for forgiveness for many years. But how to do this, since all mediums are charlatans, and the spirits they summon are deceptions made of light bulbs and sheets? However, the dead librarian of the old estate does not just protect his collection of horrors. Who else, if not him, can dispel the doubts of a skeptic with his stories? Who, if not him, can take William to the best medium and open the way to his sister, who passed away many years ago? But will the skeptic survive this night?