Lin Wanwan, an ordinary girl, has a flash marriage with Fu Shiyan, the heir to a mysterious wealthy family, in order to save her critically ill mother. After her marriage, she was accidentally bound to a "scum detection" system. Whenever there was "scum" behavior around her, the system would sound an alarm and prompt her "scum value". She discovers that her seemingly harmonious mother-in-law is an "invisible vampire" who favors boys over girls, her sister-in-law is a jealous "green tea white lotus", and her husband hides multiple identities and unknown secrets. Lin Wanwan used the system to quietly see through the hypocrisy and calculations of the wealthy family. On the surface, she was obedient and forbearing, but in fact, she secretly collected evidence and counterattacked accurately. She cleverly exposed her mother-in-law's "scumbag" behavior to her husband and made her sister-in-law suffer the consequences. She even revealed her husband's hidden vest and discovered that he was not a simple heir to a wealthy family, but had a flash marriage with her out of revenge. In the end, Lin Wanwan not only helped her husband clean up the worms in the family with the help of the "scum detection" system, but also disgraced those who once despised her. She counterattacked from a passive "tool person" to a real mistress who controlled a wealthy family and held power. She and her husband moved from a contractual relationship to true love, and staged a double crushing of IQ and emotion.
