Jung Yul-hee is a bestselling author often dubbed the 'Queen of Mystery.' After inheriting a house from her father, she relocates to a remote area with her daughter So-hee. Struggling to juggle her new novel and her daughter’s school life, Yul-hee hires Mi-jee, a local girl who has become close to So-hee, as a kind of housekeeper. Mi-jee claims to be a devoted fan of Yul-hee's writing, and at first, everything seems to go smoothly. But cracks slowly begin to form in their relationship.