It's the story of a narrator who decides to observe and follow a couple of ghosts. He's strongly interested on their lives. In reality, the narrator wants to know what's on the ghost thoughts, why are they so attached to this haunted house? He wants to discover what are the souvenirs they left in this house. The narrator decides to go on a strange trip, so he can answer his questions. Will he be able to see them? Or will the ghosts catch him first? To know what's next, I recommend reading the book.