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.
Perhaps those that practice elemental magic begin to take on characteristics associated with their chosen element. For instance, an earth elementalist might be prone to agoraphobia, while air and possibly fire elementalists might have problems with claustrophobia. Water elementalists might always seek the path of least resistance. A fire elementalist might have a cat's opinion of water. This could also apply to physical differences. Fire elementalists might have a freakishly high metabolism and a permanently high body temperature. Water elementalists would probably never get dehydrated, but might slow down a lot when it's cold. Etc, etc.