en Cuevana 3. Gyu-bin, a college student without a home, is struggling to meet her basic needs. One day, she's offered a place to stay by Geum-rim, an elderly woman living in a luxurious house. Geum-rim warmly welcomes her and treats her like a granddaughter. But soon, Gyu-bin senses something is off. She suffers from nightmares and feels a strange presence in the house. She has no choice but to stay, but can she survive what's coming?