Angar opens the door, and is immediately attacked (with surprise) by 2 hobgoblins that were waiting silently to ambush whoever opened the door. Hagar, being up front as well, is not attacked, but can see that the room is a guard tower office of sorts, with a desk on a central round rug. More importantly, he sees two manacled captives on the far side of the room, guarded by 2 more hobgoblins.