The 2022 Origin (Episode 6 Twist): The curse did not start with an app algorithm; it started with a human tragedy in 2022. Kwon Si-won, the daughter of a shaman (mudang), was secretly a coding prodigy. Terrified of being ostracized at school due to her mother's profession, she hid her identity. Her close friend Do Hye-ryung inadvertently grew close to Si-won's mother, causing Si-won to feel betrayed and paranoid. Si-won coded a basic wish program as a private vent, but when Hye-ryung died tragically amid rumors and spiritual distress, Hye-ryung’s spirit bound itself to Si-won’s digital project, transforming it into a blood-thirsty Jugu curse.
The Finale & Spiritual Realm Battle (Episode 8): In the climax, Se-ah travels into the spirit realm (Jeosung) under the ritualistic guidance of shaman Haetsal. Adhering to the rule "never look back," Se-ah resists illusions of her deceased friend Hyeong-wook. Meanwhile, Na-ri becomes fully possessed by Si-won's vengeful spirit, turning against her friends. Se-ah manages to locate the original 2022 smartphone where the root curse resides and destroys its spiritual core, freeing Geon-woo and stopping her own countdown. However, Lim Na-ri vanishes into the spiritual void, her soul consumed by the spirit's lingering malice.
Mid-Credits Scene: In the mid-credits scene, a student's phone sitting in an empty classroom lights up. The Girigo app icon reappears and downloads automatically onto a new device, hinting that as long as human desire and digital networks exist, the curse cannot be permanently erased.