Against all odds, middle school student Shion Yasuoka is emerging as a rising star in the professional shogi world. Although she lost her family at a young age and cannot speak due to the trauma, she has found the emotional support needed to continue her life and highly demanding career within her loving adoptive family and the shogi association. Her talent catches the eye of Satoru Hani, a successful businessman and brother of the current "Meijin"—the title held by the defending champion of Japan's most prestigious shogi tournament. He decides to organize a tournament open to both men and women, including professional and amateur players, and urges Shion to participate. However, Satoru appears to know a great deal about Shion's troubled past, and his actions raise suspicion from Shion's friend Ayumi Saitou and the police, who are still investigating the death of Shion's loved ones. As the end of Satoru's tournament approaches, Shion begins to remember events from the night she lost everything. She will have to demonstrate her mental fortitude to defeat her opponents and thwart the plans of the culprits who ruined her life.