Infiltrate the palace

You wait until it's dark to infiltrate the big palace when they are sleeping.
You cast an invisibility spell, and you pass the guards easily.

Inside, the halls are too quiet.
You move through a corridor, but a trap is activated and you feel a sharp pain on your ankle, the trap holds your leg.
You endure the pain and silently try to remove the trap from your ankle, but before you can open it, he steps from the shadows. A man with a hat, dressed in fine clothes and riding boots..

The revealing lamp in his hand floods the corridor with green light, stripping your invisibility away. He throws a collar to you and holds a bell in his free hand.

"Option one" he says. "You wear the collar, you come with me willingly... Option two?" He moves his head toward the guard tower. "I ring the bell. And believe me, entering the palace is a terrible offense, you will finish your days in prison."