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. Sai awakens in Hikaru an untapped genius for the game, and soon the schoolboy is chasing his own dream--defeating the famed go prodigy Akira Toya

Hikaru's classmate Ochi has won enough games to guarantee his place among the top three players who will pass the pro test. Hikaru, on the other hand, still needs to win more games, and he'll soon face his friend Waya and Ochi himself, who has been preparing for their match with Akira's help When the dust clears, who will be left standing?