Find Rose's wayward sister Velvet - part 1 Overlord Guide

Get out of this place and out of the inn. Take the stairs left down (#1) and go along the path. Break the wall to make a bridge to pass (#2). You'll meet many zombies in your way, so... well, just kill them. Go around the path and to the castle - you've got business there. Once you're in, head up the stairs (strange, no enemies here...) and you'll come to spawning pits. Now use the door near by - just open them and enter, you know.

It's Angelis Keep where you are now. This guy that's just yelled at you is Sir William (the same you've chased in the inn and after). He'll escape again but leaving us with some of his red-fashioned pals to play with (#1). Loot the room and follow William (left) fighting groups of monks in your way. When you meet him again he'll charge you for a duel so fight until he gets scared again. Kill more of his red friends and chase him a little more (go back a little). You'll enter a room with succubuses (#2) so kill them (there were spawning pits and a blood pit in the room before, in case you haven't noticed).