Dark Shadow

During the memorial festival, the heroine heads to her boyfriend's city. She grows uneasy after passing a gloomy unfinished building. Later, they both have identical eerie nightmares and keep spotting dark phantoms. Convinced she has encountered ghosts, she prays devoutly yet finds no relief. Persuaded by her boyfriend, she seeks medical help and is diagnosed with viral encephalitis. After recovering, she realizes those supernatural sights are merely hallucinations caused by the illness.