My Best Friend’s Exorcism

Best friends Abby and Gretchen have been inseparable since the fifth grade.  Now in high school, their friendship is stronger than ever.  Or is it?  Following an evening where Abby, Gretchen and their two friends partake in a little drug experimentation, Gretchen wanders off into the woods.  When Gretchen returns a few hours later, Abby…