Su Li, the only daughter of a wealthy family, traveled through ancient times because of an ancestral blood ring and met Jun Mulan, a masked female general who had the same appearance as herself. She is shocked to discover that Mulan and the ailing military advisor Jun Mozheng share the identity of "Mask General" to protect the crumbling dynasty. Su Li became a bridge between ancient and modern times, transporting materials and wisdom, and formed a life-and-death alliance with Mulan and Mo Zheng. They went to the battlefield together, battled wits with each other, and struggled through the exposure of identities, royal suspicion, and marriage traps. When the mystery of their origins is revealed and their best friend is endangered, they must work together to solve the problem. In the end, the bond that spans life and death leads to a modern reunion, and the dawn of change in the ancient dynasty and a ring containing the motto "the sun and the moon are in the same sky, the mountains and the sea are reunited" show that the legend is not over yet.
