Shy and pretty Maggie O'Connor, attending the carnival with friends, steps into the fortune-teller's tent, only to discover to her horror that she has entered the Nightmare Room.
Kat feels uncomfortable visiting her scientist Uncle Vic Frankenstein because of the rumors about him also she likes his dog Poochie but strange things happen when there is an accident in Vic's lab.
Twelve-year-olds Andy and Marnie, having enjoyed a day at Horrorland and received a gift souvenir from the Chiller House, take home a wish-granting hounds tooth which is supposedly haunted and soon learn that nothing is ever really free.
Jessica and Ryan are transported to a terrifying new world after flipping a two-headed coin from the HorrorLand souvenir shop and must reunite a prince with his missing head in order to escape.
Nicole and her best friend Lucy decide to switch bodies at the Changing Wall in the woods, but when Lucy's parents are murdered, Nicole finds herself trapped as Lucy--and the primary suspect.