Qiao Ran, a member of a hit squad in the future, transmigrates into the body of the legitimate eldest daughter of the Chen Kingdom's Minister of Revenue. The original owner had to disguise herself as a man, which suits Qiao Ran perfectly. Keeping up the disguise, she poses as a spoiled wastrel and returns to the family home to torment her scumbag father, stepmother, stepbrother, stepsister, and younger stepbrother.
As she puts them through the wringer, she discovers that several people were involved in her mother's death. She gets rid of them one by one, but someone is always following close behind.