She is a duckweed who practices medicine and uses poison to communicate with gods. She does not believe in ghosts, gods or fate. He is a reclusive young master who pretends to be a ranger, has unrivaled martial arts skills, and works every step of the way to find the truth. During a plague, the two met for the first time. She saw through his disguise, but he saw through her killer move behind saving people. Jianghu disputes, old cases of family extermination, and the game of good and evil, we go together all the way, she treats diseases, and he clears obstacles. But when her golden needle pressed against his throat, he smiled and held her hand: "My life has been yours for a long time."