Modern pharmacist Qi Yao transmigrates into the lowest-ranking medicine slave of Xuanshu Que, wrongfully accused of bearing the felony of stealing the sect's foundational 'Myriad Phenomena Pill Formula', with only a seven-day deadline to prove her innocence; upon expiration, her dantian would be crippled and she would be expelled from the mountain gate. Amidst universal doubt, the aloof sword cultivation senior martial brother Pei Zhao secretly passes her a cyan jade candle. This candle can discern medicinal properties and purify spiritual qi. Relying on modern pharmaceutical knowledge and borrowing the cyan jade candle to refine lost pill formulas, save people, and search for clues, Qi Yao investigates the true culprit step by step. She rises against the odds from a medicine slave reviled by everyone, clears her grievances, and reaches the summit of Xuanshu, while Pei Zhao, who has always believed in her, is the warmest light on her immortal path.