Even with the world in ruins, humanity endured in a weakened state. Amid the bleak landscape, two sisters defied the odds and survived. One day, they stumbled upon an old video artifact known as the "Sadako tape," a malevolent recording that claims the life of its viewers in as little as a week. Despite Sadako's vengeful presence, the sisters remained unafraid, even giving the entity the endearing nickname of "Sada-chan." Little did they realize that Sadako's true intentions were far from benign - she sought to curse any other survivors who remained. Joined by the sinister entity, the sisters embarked on a mission to hunt down and curse any others who may have managed to weather the apocalypse.
