C103 I'll show you how arrogant i am

There was actually a door here? She tried to push the door open, but it wouldn't budge. The door was a stone door, and not to mention her own strength, even if ten people combined, they might not be able to budge.

Why set up a barrier at the exit? If they didn't know where the exit mechanism was, and if the entrance was blocked, wouldn't they be trapped in this passage? Thinking to this point