Another idea for a new story from read a book on greek and roman mythology.

Apollo, roman and greek god of the Sun. Also manifested in Egypt as Amen-Ra, god of the sun. Although Apollo/Amen-Ra don't exist, their spirit lives on. Didn't Star Trek find some planet where Apollo lived? My cousin is a serious trekkie, who just had the logo of Star Trek tatooed on her leg and attends the convention in LA every year.

Apollo keeps track of all his followers in their various incarnations. The story takes place in modern day. A dark aspect of Apollo takes over the family of one of his priestesses, and causes havoc and health problems. Apollo uses human bodies to experience life, but the use of a human's body causes harm to the person health and their mind. Apollo can only be banished by an ancient greek exorcism ritual, and the young people in the family travel to Greece to learn how to exorcise Apollo from their family. But of course, he's a god and he's not going to leave without a fight.