Rin (Yumi Sugimoto), a young high school student, is an unassuming and awkward girl who is bullied at school. One day, while being bullied, she feels a sharp pain in her hand. Later, Rin learns that she is a descendant of the ancient Hiruko clan, whose members are mutants gifted with superpowers. No sooner does she learn of this, than her home is raided by anti-Hiruko soldiers. Rin's parents are killed and Rin barely escapes with her life. After killing an entire shopping district out of misunderstanding and grief-fueled rage, Rin meets Rei (Yuko Takayama), another mutant. Rei introduces Rin to a small rag-tag group of mutant rebels led by a transvestite samurai named Kisaragi (Tak Sakaguchi), who is bent on restoring the Hiruko clan's place in the world.