Half a decade has elapsed since the occurrences in Sadako 3D. Akane is expecting a baby with her partner, Takenori. Tragically, Akane passes away during childbirth, leaving behind her newborn daughter. Takenori’s sister, Fuko, steps in to look after the child. As she delves into the situation, the notorious cursed video makes a comeback. In her quest for answers, Fuko uncovers the tale of Sadako’s offspring…