Recalling a mysterious ancient prescription he knew in his previous life, Wang Jianye decides to take a risk. Just then, the System quietly awakens, bringing with it the legacy of ancient medicine, and saves his older brother's life. With the System's help, the brothers gradually emerge from the shadows and their lives grow more prosperous by the day.
Yet their peaceful life does not last. A group of wicked men with ulterior motives begins eyeing the brothers, who have been given a new lease on life. Facing the threat, Wang Jianye's gaze turns resolute. "It seems the only way to make these beasts truly behave is to take away their ability to do evil for good." From then on, Wang Jianye and his brother embark on a path of using medicine to fight the darkness and protect one another.
