Amane Todoroki is a girl who possesses ISH, the ability to use certain supernatural powers. Whilst her own power is fairly weak, she is able to borrow power from Lilianne, her twin sister who was born without a body and now resides in a stuffed bear. Amane has been doing magic shows with a few other ISH users for a performance group called Nought, which has been declining in popularity. One day, Amane is approached by an ISH user named Aya, who comes from another performance group called IAM. Aya brings Amane to a deadly performance to push her ISH abilities to their full potential...