A chess game that remained unsolved for five hundred years, a martial arts classic that unravels its mysteries, a love story fraught with trials and tribulations, emotions and righteousness hanging on the edge of love and pain. Wielding a broken demonic sword, they slaughtered through the jianghu as blood rained down, storms of love and hatred brewed, and life and death parted ways... Guan Yutian, the leader of the Supreme Alliance, desires to dominate the world and is determined to uncover the secrets of the life-and-death chessboard treasure hidden at the bottom of the Reflection Lake for five hundred years. Ren Qianhang is an elite under Guan Yutian's command. While ordered to search for the key to the chessboard, the Ling霜Sword, he fortuitously encounters his sworn brother, Yan Zangfeng. Ren Qianhang is crazily in love with the food deity Liu Yiyi, but alas, Liu Yiyi has long favored Yan Zangfeng, leaving Qianhang in despair, his ambition wildly inflated, as he yearns to dominate the world... Yan Zangfeng harbors affection for Hai Sha Palace's master Helian Ba's adopted daughter Bai Yuer. Alas, between them stands the barrier of the hatred for the murder of his mother. By chance, Jian Xiong, the young master of the Sword Casting City disguised as a man, rescues Yan Zangfeng who lost his memory due to severe injuries. Jian Xiong endures heart-wrenching longing, hesitating to reveal her feminine identity to Zangfeng... Ren Qianhang loses his mind. He forces Yan Zangfeng into a life-or-death battle over the chessboard. At the critical moment when Zangfeng exerts all his strength yet still cannot resist Qianhang's overwhelming power, the descendant of the Arrow God, Jian Yin, suddenly appears on the battlefield, breaking the Ling霜Sword, thus ending this calamity, allowing the treasure of the jianghu catastrophe to be forever buried at the bottom of Mirror Lake.