Lin Yu, a modern college junior, accidentally traveled to the Sui Dynasty after being bitten by an ant in class, and became the right-hand man of the border fortress guard - deputy general Chen Yifeng, who was highly skilled in martial arts. Faced with the crisis of the army approaching the border, he was sent to Kyoto to seek help. In the process, he went from wanting to return to modern times to complete his studies, to gradually adapting to ancient life, and finally fell in love with the princess of the Sui Dynasty and chose to stay in this era. The old military doctor who had been secretly helping him turned out to be a time traveler with a system. The fate of the two was intertwined in the torrent of history.
