Dark and gloomy, the dungeon is the ugly underbelly of the castle. A few torches line the black stone walls, throwing a meager light on the iron bars of the cells. The air is damp and still; the only disruptions are the occasional anguished moans and cries from the prisoners.
Dungeon, Inside Castle
prisoner
guard
I am a guard at the royal castle.  I am brave and strong.  It is my duty to protect the king.
Hello Please, guard, you have to let me out of here! Why should I ? I'm an innocent man, you can look at the claims and case yourself! Well, That is not my job. My job is to ensured you secured  How can you sleep at night making sure that an innocent man is stuck captive? If I let you go, my head will be cut off There are other ways of freeing me that are much easier and near foolproof. Tell me one You tell them that I have been ordered to be executed, then you take me out of the dungeon, I put on a show of resistance, and then you take me away and let me walk free. Sounds like a solid plan. Well we can start any time that you'd like.