Welcome, Agent Neuron!
Finally, you're here! Let me give you a quick update on what's happened while you were away:
As you know, the royal family of Cognition has kept their great great great grandmother's brain preserved in a glass case in their mansion since she died, 500 years ago. It has kept the mansion safe from harm since, and it is the royal family's prized possession. However, just a few days ago, someone broke into the mansion at night and stole the royal brain. Ever since, weird things have been happening at the house, it's almost like it's haunted!
I do have some bad news for you... the architects of the mansion thought it would be a grand idea to only build one door out of the mansion: the grand entrance that you just walked in through. When you walked in, though, the door locked from the outside, and we're stuck here!!! Here's the good news: someone on the forensics team found a piece of paper tucked away in one of the entrance hall's gargoyle's mouths. She believes that the robber set up a trap in this house that we need to get out of as soon as possible. You're our head detective, so we're counting on you to get us out of here! Here's the clue that our forensic team member found: