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!

Practicing at Go salons is turning out to be more fun than Hikaru thought. But at one salon he meets his match in Suyong Hong, a sullen 12-year-old who is studying for the pro test in his native Korea. By mistake, Hikaru insults Suyong, and now the only way they can settle their differences is by playing a grudge match!