Psychology expert Su He transmigrates into the body of an abandoned concubine in the Cold Palace. Using microexpression and behavioral analysis, she turns the tables in a harem rife with deadly schemes. With her professional expertise, she treats Emperor Xiao Yi’s psychological afflictions and eases his anxieties about court affairs. She rises from a pawn to become the one person he cannot do without, the one who understands him best. His indifference turns to dependence, and dependence to obsession. The emperor willingly falls into the emotional web she has woven. Witness how modern psychology quietly wins over the supreme ruler of ancient times and earns her the exclusive devotion of the entire imperial palace.