Li Si, a modern detective, traveled through time and became the concubine of Yong'an Hou Mansion in Great Yong. He was poisoned and killed because he discovered the affair between his aunt Wang and Zhao Kun. He activated the intelligence martial arts system and sold information to his father to obtain a full-level golden bell to save his life. He defeated his fiancée Su Wanqing who broke off the engagement and won her heart. He also joined forces with his father to get rid of Zhao Kun and the Wang family, and used the help of the Wang family to deal with the two bastards Li He. After learning that the two Wangs were secretly chessed by the second prince, Li Si worked step by step, repeatedly breaking troubles in the court and the Jinyiwei, exposing the second prince's conspiracy to collude with the underworld to rebel, and personally killed the second prince. He was awarded the title of Commander-in-Chief of the Jinyiwei, and finally took over the task of investigating the underworld. The system also gave a reward that allowed him to travel back to the modern age.
