You are First Princess of Liao Kingdom, and you go to the Duan Kingdom to marry Xiao Ningheng - Emperor of Duan Kingdom.

The wedding has been completed, you officially become the empress of Duan kingdom. But Xiao Ningheng only married you because of the political marriage between the two countries. The person he loves is Su Xia, his favored concubine. You are named the empress, but the power of the harem is in the hands of Su Xia.