Luna was tasked with investigating the chamber behind the sanctuary, though she wasn't really focused on her task. The foul stench that emanated from the vampires outside overcame her senses and she had a hard time trying to take her mind off of it. The only silver lining was that Tom turned out to be a nice guy, at least for Luna's standards.
Tom was one of Mark's closest friends which made Luna immediately distrust him, but he was quiet and didn't bother her. That made him one of the least annoying people in the whole group, even including her own party.
After opening the door they entered a small chamber, there were a few shelves and some pieces of old furniture, though they also noticed a trap door on the floor that obviously led to a basement of sorts. Luna then grabbed the iron ring on the wooden plank that acted as a trap door and pulled it, revealing the entrance to a cellar that connected to an underground storage room.