Rie, a fading actress eclipsed by career decline, harbors consuming professional jealousy toward Ikumi Murase, a rising actress and pop singer whose success starkly contrasts her fading relevance. This jealousy drives her actions. During an outdoor film shoot, Rie strays into nearby woods, discovering a mysterious and unsettling shrine. There, she unlocks access to dark supernatural powers. Intent on using these forces to eliminate Ikumi Murase, Rie enlists her loyal manager's help to breach a secret altar within the shrine. At the altar, Rie performs a ritual sacrifice, deliberately offering her manager as a victim to the dark forces. This act transforms the manager into a demonic entity marked by sexualized corruption. Rie then undergoes a fusion process, merging her body and consciousness with this newly created sex demon, gaining its supernatural abilities. Empowered, Rie flies to a pop concert where Ikumi Murase is performing, intent on murder. She launches a violent and violating assault on Ikumi mid-performance. The attack is cut short when Ikumi's boyfriend, wielding complementary supernatural powers, intervenes. He confronts Rie directly, resulting in her defeat and death, ending her pursuit of Ikumi Murase.