An eccentric teacher takes 4 of his students to the mansion of the "Mad Hatter", an urban myth driven insane by mercury poisoning and grief. He states that there's nothing to stress over currently: the odd, shambling "caretakers" that haunt the home are simply servants that have actually been up to inbreeding, and also the Hatter himself has been dead for many years. However as the students start disappearing one by one, those that stay start to question if the professor's experiment is really scientific ... and also if the Hatter didn't just catch his madness, but made a decision to spread it ...