A skeletal corpse is discovered deep in the mountains, and the only clue found is a shogi piece. This piece is unique: one of only seven sets known to exist in the world. The police suspects Kamijo Keisuke, a genius who suddenly appeared in the shogi world, dominating professional players and skyrocketing to fame. The investigation eventually leads to Tomyo Shigeyoshi, a figure tied to the dark underworld through illegal gambling shogi. This incident might finally uncover the truth behind Kamijo’s mysterious past. (Source: Japanese = ShochikuOfficial YouTube channel || Translation = TheBlossomReview at MyDramaList) ~~ Adapted from the novel "Banjo no Himawari" (盤上の向日葵) by Yuzuki Yuko (柚月裕子).