Lu Chen, the greatest Sword Immortal in all of history, successfully survives his tribulation and ascends to immortality. Expecting to receive a warm welcome from the Jade Emperor, he is instead assigned to the Heavenly Court's Multiverse After-Sales Department as a frontline customer service agent, employee number A9527. When cultivators from the mortal realm complain about abnormal heavenly tribulations, ineffective prayers, and relentless oppression by their sects, Lu Chen wields his customer service privileges and swordsmanship to take on corrupt officials in the Thunder Department and self-serving celestial bureaucrats. Uncovering millions of long-neglected grievance tickets, he draws his sword and demands justice before the Lingxiao Palace. As a customer service agent, he fights for the rights of all living beings across the myriad worlds.