The film tells the story of a newspaper reporter and amateur online mystery writer who investigates several well-known ghost stories that occurred ten years ago in 'Mystery Town.' Following an anonymous phone call, he arrives at the place where all the rumors first began, only to find that ten years later, this place has become an abandoned haunted building due to the hauntings. As the truth slowly unfolds, he seems to find himself in danger as well... 'Horror Notes' breaks the conventional narrative mode of horror films, using a notebook-based, multi-threaded storytelling style, presenting in a chapter-like format. It connects five complex threads through various characters: 'rearview mirror,' 'hotel bathroom,' 'bus,' 'visual door access,' creating a highly immersive experience that emphasizes the entanglements and impacts among the ensemble of characters, encapsulated in the mantra 'The notes are incomplete, the horror is unending.'