The Golem Wars are over now. There is a great peace around the world, but something evil and powerfull has been awakened in the darkness.
A PC awakes in a cell plastered with blood. On the floor lies a crucifix necklace. She escapes, chased by the guards and soon the terrible truth of her situation dawns on her…
The heroes find a small crypt somewhere and being brave adventurers they want to check it for evil forces (=graverobbing). Or for any other reason.
In a village the characters hear rumors of a man that recently came through screaming of demon attacks and murderous insects.
"Many strange things may be seen in the Great Swamps, not all real. But I tell you, there was a ship and it was real! Well it was old and all sails torn and had many holes in the hull... but anyway it was hundreds of miles from the Sea! How it came to be there, I can only wonder..."
(If it is not a hallucination, may be inhabited by wererats.)