Bow to Your Queen, My Lord DukeEpisode 9

Milana devotes everything to support her husband Nasus, only to be betrayed, poisoned, framed for death and buried alive by him and her adopted sister Aethios. Rescued by the king and her childhood friend Taric, she learns that she is the long-lost Princess Natalie. Half a year later, she returns as a princess. She uses wisdom and evidence to set her enemies against each other, exposes their crimes publicly, brings the culprits to justice, and finally marries Taric.