A'Chu reunites with the Xiu Li army so they can defend Hong Chuan city from the coming Wei army. Yan Xun's General Cheng tries to ambush them, then tries to leave the city as the Wei army draws near. A'Chu commands the city and uses different tactics to subdue the Wei army. She firmly believes Yan Xun will return from Meilin Pass to help protect Hong Chun city. Unbeknownst to her, he is rushing to Wei capital to usurp the emperor instead. (Source: frankly at MyDramaList)