Aware of the impending threat to the Wu state, Prime Minister Wu Yuan decides to do what he can to save his country and his lord, even risking his own life. In order to leave nothing to worry about at home, Wu Yuan is going to entrust his young son to the care of his friend Bao Mu in the State of Qi. The father brings the son along on the journey without telling him why. When the true purpose of the journey is revealed, the son is overwhelmed with grief, but he is obliged to comply with the father’s wish and promises to behave as Bao Mu’s adopted son.