Ranli is a psychologist who has traveled to ancient times. She is naturally smart, cold and calm, but she has penetrated into some conspiracies and people's inner worlds. For this reason, she constantly disguises herself and plays people with different personalities to break the crisis again and again. Unexpectedly, he is the only one who sees the hint of darkness hidden in her pure smile...
Chen Gexue, a swordsman of a generation, had always liked to be a loner, cold and arrogant, but he was bound by her. He was a man of great influence, and got acquainted with the three major families of medicine, incense and poison, but this led to a murderous disaster.
Just because of a cursed book and meeting a destined person once in a thousand years, Ranli opened this book that had been sealed for a long time in an ancient tomb, but unexpectedly came to a country that did not exist in history...
Tian Lanyu, a master of incense making, is extremely skilled in poisonous techniques. However, a beautiful woman who is cool and quiet, becomes a sister with Ranli. They cherish each other and understand each other. They travel together in the world, but they discover an astonishing secret and her bizarre life experience...
Yong Fengyan, a wealthy scholar who seems to be frail and has a charming smile. He is good at hiding the secret behind his smile. Perhaps he did not expect that everything about him would be seen through by an ordinary woman. Behind him, he formed an organization of people from various sects of thaumaturgy, implying murderous intentions and a series of bloody conspiracies...
All for the sake of the lost and cursed book...