In a moment of desperation, Ruby Chase makes a vow of servitude to a monster (Frank). She breaks her vow by committing suicide, setting Frank on a course of bloody revenge against the people she loved the most.

An eccentric professor takes four of his students to the mansion of the “Mad Hatter”, an urban legend driven insane by mercury poisoning and grief. He says that there’s nothing to worry about now: the strange, shambling “caretakers” that haunt the home are merely servants that have fallen to inbreeding, and the Hatter himself has been dead for years. But as the students start disappearing one by one, those that remain start to question if the professor’s experiment is truly scientific...and if the Hatter didn’t just succumb to his madness, but decided to spread it...

Nine high school kids celebrate graduation at a secluded home in the wilderness. They fight, philander, and feel nostalgic as they embark on a life away from home, in college. Once the party dies down they play a game: Dead Body. But when one party-goer takes the game too far, actually murdering the other guests one by one, it's up to the group to set aside their tensions, and ferret out the murderer before it's too late.