Set against the background of an imaginary ancient world, it tells the story of the assassin Yun Weishan who used the palace gate's marriage selection ceremony to infiltrate into the palace gate to investigate for intelligence. The master and heir of the palace gate were killed, and Gong Ziyu, the fourth prince who had always been rejected, was about to succeed. Yun Weishan then targeted the new palace master and became his bride. The story of growing up between espionage and emotion.
