Storyline:

On the wedding night of Crown Princess Gu Qing Yao, a cold-blooded assassin known as Shi Yi suddenly attempts to assassinate the Crown Prince. By accident, their souls are swapped. To protect her husband, Gu Qing Yao engages in a battle of wits and courage with Shi Yi, as a deadly game of assassination officially begins, uncovering a thrilling power struggle between the martial world and the imperial court behind the scenes...