My Best Friend's Exorcism plot
"True friendship is worth going to hell and back."
It's 1988. College students Abby and Gretchen have been best friends for a long time. But after a night of nude swimming goes horribly wrong, Gretchen begins to behave differently. She's moody, irritable, and bizarre things keep happening when she's around. Abby's investigation leads her to some surprising discoveries. By the time their story reaches its terrifying conclusion, Abby and Gretchen's fate will be determined by a single question: is their friendship strong enough to defeat the devil?