He and she had been engaged since childhood. He is the third prince. He went to war with the army at the age of 18. He made outstanding achievements in battle and was named "King Chengwu". He established "Yanmen" outside the palace. Four years later, he returned victoriously and asked to break off the engagement, but was rejected by the emperor. She was a killer in her previous life, but was killed by her henchmen. In this life, she was a princess. She was taken away by an expert outside the palace when she was ten years old. She learned martial arts and inherited the master's "Tianjin Sect".
He is as cold as ice and has outstanding military exploits; she is smart, seemingly lively but very calm. But after they met for a while, they discovered that they were old acquaintances and had loved each other when they were teenagers.
What will their relationship be like?