Orphan Su Wan is forced to dig wild vegetables to pay off her father's debts and is framed by her cousin Su Rou, but accidentally awakens the lost ancient killing medicine vein. Since then, immortal gates covet her, royal power surrounds and suppresses her, and even the Heavenly Dao sets a destined shackle. Using wild weeds as blades, she alone bears the eternal karmic calamity, defying the heavens on dual paths, rewriting the old rules of reincarnation, and winning a thread of justice for the world.