The Fallen Crown: Princess Vengeance

In the medieval Kingdom of Veyland, Regent Valos stages a coup, murdering the king and wiping out the royal clan. The young princess Elaina is rescued by a loyal knight and grows up under an assumed identity. Years later, she sneaks into the palace as a maid to seek revenge. She meets Kael, the warlord of the Northern Marches who has been suppressed by the regent. After a period of mutual suspicion, they form an alliance against their common enemy.