After a victorious battle against Jieshuo and reclaiming Banshui Pass, General Cui Yi sends a memorial to the Emperor, nominating Li Ni as the Crown Prince. Although the rest of the ministers are in agreement, the Emperor becomes angry, as does Li Ni. Li Ni severs ties with Cui Lin, feeling forced into a corner by her and her father. Li Jun and Li Lai resort to desperate measures to ensure Li Ni does not become Crown Prince. (Source: frankly at MyDramaList)