When the sweetest couple made for each other become mortal enemies in just one day. "I'm the one who will end you brother's life." He said. "Even if that's the last day I live."

A beastly, cold hearted warrior who won't let anyone else into his heart except his late wife. A mischievous and cheerful girl who fell for him at the first sight. How will they end up if they were forced to marry and live together?

During early Chinese history in the State of Northern Qi, it was said that there was a warrior prince who possessed the beauty of a woman and wore a fearsome mask in battle in order to instill fear in his enemies. His name recorded in history is Gao Changgong, but here, his name will be Zhang Yixing. When a fearless woman runs onto the battlefield during one of the prince's battles, he never imagined how important she could become in his life. This story is based (very) loosely on the life of

Zhang Yixing is the crown prince of the Mongols, who have been overthrown from their once prosperous Yuan dynasty by the Ming dynasty. He is young, handsome, and talented, yet refuses to get married for a reason he has hidden deep in his heart. Xu Feiyan is the second eldest princess of the Ming royal family, skilled in everything from the medicinal arts to dance to painting. A single visit from the Mongol Khan and his sons brings these two royal children together, and something about Feiyan