Princess Serap is the only frail human seeking courtship in Qaf, a magical world full of long-lived djinn. Frustrated by failed romances with courtiers who are eager to usurp her title, Serap enlists a witch to help her find the key to immortal life. The witch tells her of a monstrous human, The Immortal Killer, who has the unique power to end immortal life in hopes he may know how to obtain it. Racing to leave the palace before her parents can stop her, Serap soon finds herself abandoned on earth in a strange place full of ghouls and ghosts.
When Serap arrives at the killer's house, he chases her down and locks her in his dungeon in a house filled with strange magical artifacts, whispering spirits and more books than she has ever seen. Determined to free herself, Serap makes friends with an enigmatic and paranormal apparition called Evil who gives her a set of magical and other-worldly tasks to solve. She must navigate staying alive while she searches for the secret to immortality and how to free herself from her terrifying, yet strangely befuddled captor.
A parade of haunted house guests and a mansion full of secrets turn Serap's plans on their head. To survive, she'll have to discover who is telling her secrets in the ghastly dark and accept that The Immortal Killer may be the only one who can help her.