Whew. That was a close one.
Isabelle: While exploring the room, you find four surviving casks of the famed Three Squires' sour beer (See spoiler). You also find that one of the racks on the western wall is on rollers, and behind lies a closed closet door.
Inside the closet, there is a sword, crossbow, a battered shield, and a helmet on a rack. In the center of the closet, there is a small unadorned chest. The chest is locked.
The trail goes down the stairs into the first cellar room and into the open room (See map).
Map: