College student Jian Ruonan transmigrates into a true-and-false-daughter novel she has read. Starting out by counter-attacking to sell off her human-trafficker adoptive mother, she relies on system tasks to hug her biological mother's thigh and return to the Marquis's estate. Everyone in the Marquis's estate unexpectedly can hear her inner thoughts, using them to distinguish loyal from treacherous and punish evil relatives, but when she ridicules the Fourth Prince as "a cripple who can't get it up/doesn't work," she is heard loud and clear by the person himself. The system bound to the Fourth Prince discovers that as long as he has more contact with her, he can absorb "lamp oil" to heal his legs. Thus, he takes the initiative and approaches frequently—from being treated as a mobile human shield to blocking a knife for her and standing back up—and the two grow closer and closer amidst eating melons and punishing scumbags. Corrupt officials, the fake daughter, and rebellious princes appear in turn, Jian Ruonan's inner voice exposes melons all the way, and finally she reaps a double harvest of career and love.