As Vickiâ€™s behavior becomes more dangerous, Stefan tries to help her. Elena tries to convince Jeremy to stay away from Vicki. Caroline gives Bonnie a necklace she took from Damon to wear with her Halloween costume, and when Damon tries to take it back, he is surprised by Bonnieâ€™s abilities. Bonnie discusses the incident with Grams and learns more about her familyâ€™s past. Trying to cheer Vicki up, Matt takes her to the high schoolâ€™s haunted house, but the evening soon takes a terrifying turn.