The young master of the Shen family, Shen Chengze, was weak in martial arts and was publicly humiliated by his sworn brother, Shen Changqing. On the night of his coming-of-age ceremony, Changqing broke into the inner hall and raped his mother, Murong Wanqing, then colluded with a Xiongnu female cavalry to defect. His sworn sister, Shen Qingyin, left in disappointment. Chengze knelt before his mother, begging her to teach him the art of mounted combat, vowing to take revenge and reclaim the Shen family.
