Cheng Yaojin followed Li Shimin against Dou Jiande at Hulao Pass. Just when he was about to break Hulao Pass, he was born with a vision, thunder was rolling, and strong winds were blowing. He was drawn into another world. He met the nun Avril who had just been captured by the goblins. After rescuing Avril, he started a journey to another world to find a way back.
