While searching through his grandfather's attic, Hikaru Shindou stumbles upon an old go board. Touching it, he is greeted by a mysterious voice, and soon after falls unconscious. When he regains his senses, he discovers that the voice is still present and belongs to Fujiwara no Sai, the spirit of an ancient go expert. A go instructor for the Japanese Emperor in the Heian Era, Sai's passion for the game transcends time and space, allowing him to continue playing his beloved game as a ghostly entity. Sai's ultimate goal is to master a divine go technique that no player has achieved so far, and he seeks to accomplish this by playing the board game through Hikaru. Despite having no interest in board games, Hikaru reluctantly agrees to play, executing moves as instructed by Sai. However, when he encounters the young go prodigy Akira Touya, a passion for the game is slowly ignited within him. Inspired by his newfound rival, Hikaru's journey into the world of go is just beginning. 12-year-old Shindou Hikaru is just your average 6th grader. One day, while searching through his grandfather's attic, he comes across an old Go board. Upon touching the Go board, Hikaru is possessed by the spirit of Fujiwara no Sai, and continues to be haunted by him soon after. Sai was once a great Go player, who committed suicide and continued to stay in the world as a spirit desiring only to play Go once again. Finally bending to Sai's pleas, Hikaru allows Sai to play Go through himself, unknowingly attempting the first game with the young prodigy Touya Akira. Time has finally started moving, as Sai's quest for the perfect game, "The Hand of God", is set underway. Based on the manga by Yumi Hotta and Takeshi Obata.