Shen Qinghe, a top modern forensic doctor, accidentally traveled through time and became the abandoned daughter of the Prime Minister of the Dajing Dynasty. She was bound to the "Book of Life and Death" brain system (which can see fragments of a person's remaining lifespan and cause of death). However, by accident, she was picked up and taken home by Xiao Jue, the powerful regent known for his ruthless and sinister ways. The two went from testing and exploiting each other to joining forces to break the situation in the maelstrom of intrigue, and eventually became each other's only "exception".
