Xia Xueyi, the legitimate daughter of a military family, is betrayed by the Crown Prince and has her phoenix crown taken away just before her wedding. She decisively breaks off the engagement and marries Xiao Lingxiao, the Regent Prince, instead, leaving the wedding hall resolutely clad in battle armor. Her former fiancé later discovers that Xia Xueyi was the true benefactor who once dug him out of frozen earth to save his life, and he is consumed by regret. Meanwhile, Xia Xueyi joins forces with the Regent Prince as an equal, launching a stunning comeback at court and claiming half the realm!