After stumbling across a haunted go board, Hikaru Shindo discovers that the spirit of a master player named Fujiwara-no-Sai has taken up residence in his consciousness. This awakening ignites an untapped genius for the game within Hikaru, propelling him on a quest to defeat the renowned go prodigy Akira Toya.

As Akira turns professional, Hikaru realizes that reaching his rival's level will require immense dedication and effort. Before even considering the professional test, he must first conquer the challenges of the insei school and surpass all its students. With each step forward, Akira's shadow looms larger, and Hikaru must push himself to the limits to close the widening gap between them.