The bold and forthright Lin Sa finds herself randomly possessing strangers every night when she falls asleep. Thinking it is just a dream, she cuts loose, punishing arrogant car owners, fighting back against difficult customers, and exposing workplace shirkers, allowing the aggrieved to finally vent their frustration. It is not until the people from her dreams appear in real life that she realizes everything was real! From then on, Lin Sa uses different identities to clean up urban vices and helps those accustomed to swallowing their pride learn to stand tall.