Akari Taiyo is a girl who takes after her late mother Hinata as an apprentice fortuneteller. She lives with her aunt and uncle, and her cousin Fuyuna Shinzaki, who is jealous of the attention Akari receives. One night, Akari has an apparent dream in which she is attacked by a giant plant monster, and sees herself as a magical girl killing it. When she awakens, she finds Fuyuna lying dead in her bedroom...