Su Qian, who was terminally ill and was dying soon, accidentally activated the "merit system" before she died. As long as she continued to do good deeds and accumulate merit, she could redeem her life points and various extraordinary rewards. In order to preserve her life and find out the truth about her "illness", she agreed to a contract marriage with the wealthy heir Lu Yesi. Lu Yesi, a financial tycoon who is gentle on the outside but crazy on the inside, chooses Su Qian because she looks weak and can be bullied, and is the best shield against family pressure to marry and business rivals.
After the marriage, Su Qian wore the shell of a sickly beauty and secretly used the system to "gain merit" crazily. During the day, she is Lu Yesi's "little wife" who falls down in the wind and needs careful care; at night, she may be a mysterious hero who saves people from fire and water, or she may be the "black lotus" who punishes bullies. Lu Yesi gradually discovered that his little wife was far from being as simple as she appeared. The chess game he set was always stirred by her inadvertently; his heart, as cold as an iceberg, began to be melted by her inadvertent warmth and powerful contrast. From the initial use of each other, suspicion and testing, to later becoming enemies and pretending to be real, the relationship between the two gradually warmed up as they faced crises together again and again. When the truth about Su Qian's poisoning was intertwined with the Lu Yesi family's conspiracy, they were forced to move from "falling in love and killing each other" to "joining forces to break the situation", and finally uncovered all the shady stories and became each other's only salvation and favorite.
