An Jiu, a lethal assassin known as the Scythe of Death, nurses an injury after a mission and meets Mei Jiu. Together, they uncover dark secrets within Mei Mansion, revealing its ties to an ancient lineage of royal bodyguards-turned-killers. An Jiu, harboring feelings for her martial arts mentor Chu Ding Jiang, faces betrayal as Mei Mansion falls and Mei Jiu is slain. Vowing revenge, An Jiu delves deeper into a web of intrigue, love, and vendetta, risking all.