Su Youwei, a concubine who lives under the care of others, has to pretend to be an idiot all year round in order to survive the persecution of her aunt and sister. By accident, she met Lu Jiuci, a fortune teller who could see into the dark corners of people's hearts. In the name of "doing justice for heaven and killing the heart with his words," Lu Jiuci actually used Su Youwei's special status and "ignorance" perspective in the house to jointly weave one after another "prophecies" that were led by people's suspicion and resulted in family scandals. From the initial use of each other, the two gradually became each other's only reliance in the cold and deep house during countless frame-ups and counterattacks against Su Youwei. Su Youwei relied on the "mind-observation skills" she learned from Lu Jiuci and the disguise brought by her own "idiot" status, cleverly instigated the relationship between her concubines and concubines, and revealed old secrets. In the end, not only did the person who harmed her reap the consequences, but she also found the truth about her mother's death, and left the cage-like house hand in hand with Lu Jiuci.
