Wu Tanyin is a witch doctor from Southern Xinjiang, skilled in both sorcery and poison. She holds half of the lost Book of Ten Thousand Gu Poisons and Medicine.
She takes in Ji Heng, a down-and-out prince who is gravely wounded and near death, and plants a symbiotic Gu in his bloodline, turning him into a living medicine man loyal to her alone.
His blood is her universal medicinal primer, his bones are vessels for raising Gu. In this life, he obeys only her: he lives to be used as medicine for her and dies to feed her Gu.
Cold-hearted and detached, she regards him only as the perfect test subject and an inexhaustible storehouse of medicine.
But she doesn't know that from the moment she planted the Gu, it wasn't the art of Gu that fell in love. It was his heart, willingly sinking into her.
When schemes for power sweep over them and everyone wants to seize the bloodline of this peerless living medicine man, the man in red shields her behind him. Ten thousand Gu bow before him; the whole world stands against him, but she alone is his destiny for life.
