Tang So-hwa, the Master of Ten Thousand Poisons, is a genius of poisons who knows no poison in the world. Betrayed by her husband, the head of the Namgung Clan, her family was annihilated, and So-hwa, the sole survivor, slaughtered the Namgung clan with poison before taking her own life. Just as she closed her eyes, having achieved the revenge she so desperately longed for, she opened them to find herself back in the golden age of the Sichuan Tang Clan when she was seventeen?! Peace in the Central Plains? The loyalty of the Murim Alliance? I don’t care. She sets out to solve incidents and accidents solely to protect her clan, but for some reason, the Sichuan Tang Clan finds itself becoming the center of righteousness… “No, I just need to save my clan!