Shen Jiarui is the most miserable woman in Xiazhai Village, Miaojiang. The punches of her husband Wu Laogui, the difficulties of her mother-in-law Wu Zhou, and the covetousness of her gambling uncle forced her to a dead end. Until her ribs were broken and thrown into the firewood shed, a complete memory that did not belong to this era exploded in her mind - the thousand-year inheritance of Miao poison, the recipe of every poison, and the price of every spell were as clear as if they were carved into the bones. She gave her husband an itch and made him take off his clothes and scratch him in public. The whole village thought he had a heart disease. She planted a phantom poison on her mother-in-law, allowing her to see the wronged souls killed by her every night. But what made her heart tremble the most was the person who shouldn't be there. Yu Qingzhou, the young man with whom she had a private life, suddenly disappeared seven years ago and is now a medicinal materials merchant wearing a Chinese tunic suit. He had a foreign gun on his waist and was surrounded by guards with knives. Even the village elders laughed with him. Every time she was bullied, he would always appear accurately and resolve the crisis with ease, but he never recognized her. Only Shen Jiarui knew that the Gu pattern on his wrist was exactly the same as the one on her body - it was the heart-connecting Gu that reunited after a broken mirror. It was planted in a life-or-death agreement. If you harbor resentment, the Gu would eat your heart every month on the full moon. His pain over the years was no less than hers. When the warlord's iron hooves stepped into the Miao territory, the bandits kidnapped all the women in the village, and the village elders knelt down and begged Yu Qingzhou to take action. He finally took off his disguise as a businessman and revealed his true identity, which frightened the entire Southwest. And Shen Jiarui also discovered that her awakening of Gu magic was no accident. Behind it was a blood debt and calculation that spanned the two realms of Yin and Yang and lasted for twenty years.