Vicki's (Kayla Ewell) behavior becomes more dangerous, Stefan (Paul Wesley) tries to help her. Elena (Nina Dobrev) tries to convince Jeremy (Steven R. McQueen) to stay away from Vicki. Caroline (Candice Accola) gives Bonnie (Katerina Graham) a necklace she took from Damon (Ian Somerhalder) to wear with her Halloween costume, and when Damon tries to take it back, he is surprised by Bonnie's abilities. Bonnie discusses the incident with Grams (guest star Jasmine Guy) and learns more about her family's past. Trying to cheer Vicki up, Matt (Zach Roerig) takes her to the high school's haunted house, but the evening soon takes a terrifying turn.