Welcome to the Phantom Thieves

You struggle to get to the top of the scaffolding, after a few tries you make it up onto the top of the scaffolding. You follow the path to find that it leads into a grand hall near the middle level of the castle that looks like a church. As you hide at the side of one of the seats. You see that there are around ten guards in the room; while looking around, you also see there is some stairs on the left side of the church. You sneak towards the stairs and look for an opening, after you have a clear shot for the stairs you dash towards the stairs. You start to step up the stairs very carefully, but one of the guards spot you from the top of the stairs. The guards yell that they seen an intruder in the church, you bolt back down the stairs but trip from running to fast. The guards catch up with you and they hold you up, they say nothing to you but one of the guards hit you with a shield and knocks you out cold.