The heroine Ye Mu was originally a girl from the 21st century. She accidentally got an ancient book while performing a mission. Unexpectedly, she entered the world of the book and became a vicious concubine of the general's mansion. Only by protecting the little slave who was bullied by the original owner, the future emperor Mo Linyuan, could she return to the real world. Therefore, Ye Mu recruited Mo Linyuan as a personal bodyguard, constantly brushing his favorability around him, and cultivating his all-round development of morality, intelligence, physical fitness, aesthetics and labor since childhood. With Ye Mu's protection and support, Mo Linyuan let go of the hatred of the previous humiliation, and the story of the domineering and cute lady and the loyal and black-bellied guard slowly unfolded.