Mystic Nine follows Zhang Qishan as he joins forces with Wu Laogou, alongside Huo Xiangu and the other members of the Mystic Nine, when turmoil returns to Changsha. The mysterious disappearance of Unit 401 uncovers a century-old secret. Faced with life-and-death choices, bound by brotherhood, responsibility to their sects, and devotion to their country, they risk everything to protect their home and overcome the crisis.

周若兮为了自己的野心，舍弃与燕王李晏的感情，处心积虑嫁给太子。在她即将权倾天下之际，被李晏以“清君侧，诛妖后”为名，生擒于后宫之中。原来，这是李晏痴心的救赎，他打算带她远走高飞，却不料中了皇帝的阴谋，两人死在皇城之下。在生命的最后一刻，周若兮终于明白自己的错处，发誓若有来世绝不重蹈覆辙，而故事竟真的奇迹般回到伊始。这一次，周若兮想要修正错误、保护李晏，只是没料到，最大的对手竟是三年前的自己……

背负灭门之仇的凤凰少年，在遭遇巨变后改名换姓谢淮安，潜伏十年。此时长安城暗卫势力根深蒂固，各方势力欲夺王权。在波谲云诡的江湖纷争与朝堂暗战中，谢淮安十年布局复仇之棋，一步步揭开往事迷雾，侠义之战即将开始。