Swamped

You soon realize it's a sound you've heard before. When Rider was treating a wounded muckbeast, you heard noises just like that through the door at night. Rider said she was fine, just asleep - apparently they snore rather loudly.

You open the door carefully, and confirm that there's an unconscious muckbeast blocking the way. Well, you know how to deal with them if you need to. What concerns you more is why it's asleep.

If it were gassed, would it be snoring? That seems a little unlikely. And you don't see any sign of gas in the immediate area.

You step outside, carefully walking over the beast, and close the door. You don't see anyone else around - but that doesn't mean they aren't here. For one thing, you're pretty sure someone tried to send some gas in through the sewer system.

Which makes that seem like a good place to start investigating. First, though, you should meet up with Minnie. You carefully make your way over to the emergency exit to see if she's gotten out yet.

That's when you see something even more out-of-place than the muckbeast.