Hikaru no Go opens when Hikaru Shindou, a schoolboy with little interest in board games, discovers an old go board in his grandfather's attic and awakens the spirit of Fujiwara no Sai, an accomplished go player from the Heian Era who once served as instructor to the Japanese Emperor. Sai has spent centuries waiting for a chance to complete his unfinished dream of reaching a divine level of go no player has ever achieved, and because he has no body of his own, he can only pursue that goal by guiding Hikaru's hands across the board.
What starts as reluctant cooperation soon draws Hikaru into the world of competitive go. Under Sai's guidance, he learns the depth, pressure, and pride that shape the game, while slowly discovering his own instincts and the satisfaction of winning on his own terms. That path becomes even more intense when he meets Akira Touya, a brilliant young prodigy whose skill and drive make him Hikaru's fiercest rival. Caught between Sai's ambition, Akira's challenge, and his own desire to prove himself, Hikaru's growth turns into a coming-of-age story built on rivalry, discipline, and the determination to stand on the board in his own right.