Xiadie, a transmigrator who once held the title of Death Demigod in the Honkai: Star Rail universe, finds herself reborn into the world of Douluo Dalu 2: The Peerless Tang Sect. Possessing the memories of her past life and the remnants of her Authority of Death, she struggles as the laws of this new world suppress her original powers. Accompanied by the soul fragment of the Holy Necromancer, Electrolux, who resides within her Spirit Sea, Xiadie navigates the Star Dou Great Forest.

As she encounters the protagonist Huo Yuhao and the members of the Tang Sect, she begins to challenge the established norms of the Spirit Master system, questioning the very foundations of the world's power structure. With a goal to return to her home universe and reunite with her sister, Xiadie must adapt her unique abilities to this new reality, all while balancing the delicate equilibrium between life and death.