Vampire Vicki turns the school's Halloween haunted house into a truly terrifying experience when she can't control her urge for blood. Meanwhile, Damon is surprised by Bonnie's psychic abilities when he tries to take back a necklace she's wearing that belongs to him.

Jeremy gets a break from the mysterious new history teacher, Alaric Saltzman and introduces Alaric to Jenna. Bonnie is having terrifying dreams about one of her ancestors. Despite Elena's efforts to smooth things over, Bonnie and Caroline continue to argue over the medallion. When the girls hold a séance to help them decide what to do, the results are stranger than any of them expected. Matt comes to Caroline's aid when she needs a friend. Damon finally reveals to Stefan the stunning reason he has returned to Mystic Falls.