Su Tangtang accidentally damages an immortal alchemy furnace and is punished by being sent to the mortal realm for cultivation trials, where she is also bound to a merit system. After accidentally falling into the back mountain of Qingyun Sect, she unexpectedly reunites with her old acquaintance, Senior Brother Mo Wuhen. Ye Wuji, who has been concealing his presence within the sect, is drawn to the power of merit surrounding her and silently stays by her side to protect her. From then on, Su Tangtang joins forces with her two companions to outwit fellow disciples harboring ulterior motives, overcoming numerous challenges through her intelligence and resourcefulness. Together, they stand against the invading forces of the Demon Realm and work to stabilize the world's order, ultimately safeguarding peace across the Three Realms.