Modern national security agent Qin Yue fell into the sea while performing a mission, traveled to the Qin Dynasty and became an amnesia death row prisoner in Xianyang Prison. After being tortured in the early stage, he accidentally recovered part of his memory and fighting skills on the eve of his execution, and managed to escape from the desperate situation. In order to survive, he transformed into a knight-errant, but was involved in the imperial power struggle after saving the assassinated Qin Shihuang. Gradually, he discovered that his time travel was not accidental, but related to Qin Shihuang's secret experiment to seek immortality. In the process of helping Qin Shihuang unify the remnants of the six kingdoms, reform the government, and resist the conspiracy of the mysterious organization, Qin Yue rose from a prisoner to the "sword bearer" of the Qin Dynasty, and finally revealed the truth about time travel and helped the First Emperor complete the true unification. However, he chose to retreat bravely and hide among the people to witness the peaceful and prosperous age.
