Yi Shishi, a modern female killer who always kills people conscientiously and lives a low-key life, was unfortunately captured during her mission, and was lynched to death within three days. When he woke up from a dream, he found that he was in prison. He learned that he was a female concubine of the Wen family who had been convicted, and was then sent to the military camp to work as a prisoner. He made a decisive decision and fled late at night. He was caught by the shadow guards next to Lord Yan Xiaohou who was sent to the army to conduct surveillance. After being hung up for a whole night, he ended up following the Lord Marquis to find a way out. Let's see how a second-rate killer continues his career path in his previous life under a group of first-rate shadow guards.