Amnesiac Nanhuang Xu Wannan—once a legendary warrior—works as a security guard, unaware his wife, Chen Qianqian, is cheating with a rival heir. After a head injury, his memories return: he’s the Supreme Commander of the southern borders, urgently needed to repel an invasion. Divorcing his treacherous wife, he hosts a grand comeback ceremony, shocking the nation. But when his true love (a general’s daughter) tracks him down, he must choose: reclaim his throne or embrace a new life.