Su Qingyuan, a doctor of modern Chinese medicine, traveled through time and became the daughter of a guilty minister and entered the palace as a palace maid. With her spiritual space and superb medical skills, she managed every step of the way in the turbulent harem. She cracked the poisonous plot, cured the serious illness, and used each other to depend on each other in life and death with Xiao Che, the forbearing seventh prince. They worked together to overcome the whirlpool of palace battles and imperial power, and finally reached the top position. She not only achieved self-reliance, but also gained the legend of being the only one to be loved for the rest of her life.