Freshly graduated from middle school, loner Yanagi Yukito finds himself spirited away to his childhood home on the Ayaka Islands. There, he discovers that he is descended from a line of magic users known as Ley Masters.

Jingi takes Yukito on his first job to pacify an Ara-Mitama chasing people away from the local canal, but the origin of the problem may be closer to home than either of them believed.

Yukito and Jingi visit the First Island, a popular tourist destination. There, they meet Ibuki, another former disciple of Yukito's father, but one who has a very different view on how to handle Ara-Mitama.

While visiting Kasen Shrine, Yukito is surprised by an offer of friendship from Kurama's disciples Yako and Chataro. But when they put his Ley Mastery to the test, he finds his fear of losing control of his powers again may not be unfounded.

Yukito tries to fend off the Ara-Mitama with Ibara, Chataro, and Yuko. When Aka and Haruaki arrive to help, things get heated as their ideals clash and emotions run high.

A glimpse into the halcyon past when Aka, Haruaki, and Jingi were Makoto's young disciples, and how Makoto stepped up to save the Ayaka Islands one fateful night when disaster struck.