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 career as a professional Go player begins! In his first game, he must face veteran player Toya Meijin, none other than Akira's father. But to Sai, this round is personal. Then Sai attempts to teach a cheating Go player a lesson he'll never forget... Will Hikaru's ghostly master do him proud, or make him like an amateur?