From the introduction:
This is a fairly cruel adventure for the investigators. They will believe that they are going on a well earned vacation on a peaceful island in the middle of a Maine lake. Unknown to the investigators, chemicals leaking from a forgotten illegal dump site have leaked into a marshy area and mixed with the algae, slime and muck encasing the bones of a drowned man. The horrid combination gives rise to a truly alien intelligence, one that is very curious about the world, especially about what is inside those fleshy squishy things...
So, instead of a peaceful week of fishing and lying in the sun, the investigators will have to face a walking pile of slime, muck and death. Not exactly the sort of vacation recommended by your friendly travel agent.
The adventure is set in 1990s and is located in Maine. With a few minor changes it could be located in other times or places.