The Deinhart Manor has been a looming shadow over town for as long as anyone can remember, and it's been abandoned for even longer. When the final Deinhart descendent passes, the huge gothic manor is up for sale for the first time ever. Which means Arden can steal the keys from her mom’s real estate office...It’s time for a graduation party that no one will ever forget.

Arden and her friends, each have different reasons for wanting to throw the party to end all parties. But when the manor doors bar everyone inside and the walls begin to bleed, all anyone wants to do is make it out alive.