Qiu Xiaowu was gravely injured and fell into a coma. Her family took her for dead and abandoned her in the wilderness, where she was rescued by the master of the Poison Doctor Pavilion. After years of hard study, she became a master of both medicine and poison.
Prince Jing was once a war god, a favored son of Heaven who guarded the frontier and kept countless families safe. But the reigning emperor grew suspicious of him, forcing him back to the capital to live as an idle prince.
As the eldest prince and the crown prince vied for the throne, Prince Jing refused to take sides and was attacked by someone who secretly poisoned him. With his life hanging in the balance, an advisor to Prince Jing's household invited the renowned wandering physician, Medicine Elder, to treat him. At a loss, Medicine Elder thought of Qiu Xiaowu, who had come to the capital to attend a medical and poison arts competition. Relying on the tenuous bond between them as teacher and student, he persuaded Qiu Xiaowu to complete the treatment in his place.
Qiu Xiaowu had no intention of getting involved in the royal struggle. She only wanted to live an ordinary, peaceful life. But she could not refuse Medicine Elder, and she was moved by the stories of how the war god prince had repeatedly risked his life to protect his country and its people, bravely fighting the enemy and even venturing alone into their ranks to rescue the hostages from his own kingdom. He had also spoken up for commoners, using his military achievements to secure policies that benefited the people and then making sure they were properly implemented. In the end, she chose to do everything in her power to save him.
She never expected that this would bring the two of them together and set them on a path of love and conflict.