Serial murders occur frequently in Qingyang City, and the dead are all heartbroken and mysterious. Su Yuxuan, who was hiding in the Yuelai Inn and working as a busboy, secretly discovered the clues and hidden secrets. Cao Ziqing, a chivalrous girl who came to search for her father, broke into the inn with her late father's sword and got closer to the truth step by step. A secret book hidden in the pyre, an old case of the disappearance of a miracle doctor from 20 years ago, and a life-extending magic of picking the heart and refining medicine, tightly bound the two people. There is a turbulent undercurrent in the small inn, and everyone around them is hiding secrets. They work together to pursue the murderer, vowing to uncover the shocking conspiracy behind the murder.
