By night, teenager Yoshimori Sumimura is a "kekkaishi"--a demon-hunter who specializes in creating magical barriers around his prey. By day, Yoshimori's got other demons to battle: an addiction to sweets and a seriously crotchety grandfather! Yoshimori's pretty neighbor and childhood friend, Tokine Yukimura, is also a kekkaishi, but their families are feuding over who is the true practitioner of the art.

Sibling rivalry surpasses the bounds of life and death itself when Yoshimori discovers secrets of a ghostly patissier's past life. The fraternal theme continues when Yoshimori's older brother Masamori returns to Karasumori. Everyone seems to respect and admire Masamori--but Yoshimori feels alienated and left out in the cold. All this and more ayakashi to catch and cakes to bake--what's a young kekkaishi to do?