Eight-year-old girl Liu Yimei originally lived a simple and happy life. One night, her father was accused of killing a court official and was later sentenced to death. The mother couldn't bear the blow and couldn't afford to fall ill after giving birth to her younger brother prematurely. Soon after, her parents and younger brother passed away one after another. Before her death, the heroine's mother arranged for the heroine to enter the enemy's house as an assassin.
The kind-hearted neighbor couldn't bear that the heroine died in vain, so he sent the heroine to the victim's house as a servant girl, that is, the hero's house. Because of the male protagonist's father's death, his uncle wants to take away his position as the heir apparent.
The heroine helps the hero and his family expose the conspiracy of his uncle and aunt, helps the hero's sisters marry into good families, and pushes the hero step by step to become the heir apparent.
The evil uncle and aunt couldn't succeed in their plot, and they hated the heroine so much that they sold her to the dangerous place "Ghost Fan Tower". After being rescued, she recognized her former master and wife as adoptive parents and got rid of her slave status. This strengthened her determination to find out the real murderer behind the scenes and clear her father's wrongdoing.
The hero and heroine rely on their adoptive father's relationship to look through old case files, find out the flaws, lead to old palace cases from decades ago, and find the real culprit behind the scenes. He also used tricks to disintegrate the real murderer's camp, solve the mystery, and make the truth known.
In the end, the good guys get their injustice, the bad guys get their comeuppance, and the lovers finally get married.
