Su Qing, a criminal psychologist, traveled through time and became the daughter of a widower who was discriminated against. A bizarre murder case that imitated the ritual sense of the previous dynasty forced her to cooperate with Pei Che, the cold-faced prince who was in charge of the prison and was known as the "Living King of Hell". She relies on micro-expression analysis and psychological portraits, and he cuts in from the perspective of power and interests. The two work together to tear apart the deep web behind a series of unsolved cases. From the boudoir in the mansion to the battlefield at the border, every bloody crime points to the same undercurrent trying to overthrow the dynasty. She is the sharpest knife in his hand, and he is also her strongest shield when she fights against the entire decadent rule.
