I am in need of this right now. I'm using witch and Royalty in very loose terms. Royalty would be the head of the town or kingdom and the witch would be a magic-user. It can be a one on one or have more people, it doesn't matter. And yes, this may be a romance.
A witch has been terrorizing the town for years until one day they were caught. They were sent to the Royal in shackles. They thought they were going to be hung or burned. Instead, the Royal askes for help to get more control over the town, seeing that some people had started a revolution. There are traitors in the palace as well. Can the Royal really trust the witch?