Shindo Hikaru is a sixth grade elementary school student. One day, Xiaoguang went to his grandfather's house to hunt for treasures, hoping to earn some pocket money. Unexpectedly, he accidentally dug out an old chessboard. The moment he touched the chessboard, the soul of Fujiwara Sawei, a genius chess player from the Heian era who possessed the chessboard, entered Xiaoguang's body. Zuo Wei regards Go as his life, and under his influence, Xiaoguang gradually becomes interested in Go.