Crazy Duke and Fallen Queen

She's the Queen who lost a war. And he's the man who won.

Theodora was the Queen of Polis, a city-state that lost the war against the most powerful empire in the continent.
She is sure that they'll execute her immediately, but somehow she survives the meeting with the Emperor, and she finds herself... Married?
Who is that mysterious man that is now her husband, and why does he seem to know so much about her?
Can she accept him, and maybe find love, or will she forever hold the grudge of her city losing its freedom?
A fallen queen, that doesn't know how to be anything else, and a handsome Duke who's the cause of her ruin. Will they find some happiness in a marriage that's been apparently forced on them?