Blood River is the realm's most feared assassin guild, jointly run by the Su, Mu, and Xie clans. They can strike royals in court and crush great sects in the wild. When the patriarch is poisoned on a mission, the three clans vie for the top seat. Su Muyu leads the Spider-Shadow unit and shields the dying leader on the road to a cure. He clashes with elder Su Zhe and old friend Su Changhe, and meets master healer Bai Hehuai. After brutal power struggles, Su Changhe becomes new patriarch and Su Muyu heads the Su clan. They launch the "Other Shore Plan" to drag Blood River out of the shadow and forge a new destiny, free from being anyone's blade.

In the Great Qi dynasty, young Emperor Xiao Huan assumes the alias Bai Chifan and draws close to Ling Cangcang, daughter of the Grand Tutor, to reclaim power from him and the Empress Dowager. Cangcang, the brave and righteous leader of the Fenglai Pavilion, joins him in investigating the Lingbi Sect. Their bond deepens into love, but her master's death sparks a fatal misunderstanding. Though they become Emperor and Empress, old wounds keep them apart. Refusing to abandon the truth, Cangcang endures betrayal and peril, only to discover Xiao Huan's silent devotion. Together, they restore peace, and prove that neither love nor the realm must be forsaken.