Everyone's got their demons ... History teacher Kyle Saunders has a dark secret - he's host to a short-tempered, foul-mouthed parasite demon named Ryka. As if High School wasn't Hellish enough - with unruly students, angry parents and meddlesome colleagues - now he has to deal with a rebellious Ryka, who seems eager to take his possession to the next level. He's after more than just Kyle's soul ....