Sharp Blade in the Snow.

Falsely accused of murdering her father, Princess Feng Li returns from exile as a feared ruler to uncover the truth behind the crime. At a decadent banquet designed to flush out her enemies, she draws close to Yun Zhan, a mysterious slave who is secretly a fallen prince. As their hidden motives collide and political conspiracies close in, Feng Li and Yun Zhan must choose between revenge, power, and the love that threatens to undo them both.