Riley Shiner is obsessed with a video game based on a real haunted house in his neighborhood. He has played the game so often he knows it by heart, but there's a level he just can't seem to beat. Riley and his twin sister Scarlet know the haunted house is full of monsters and evil spirits, but decide to spend the night there anyway.
When Tommy is sent to a special camp to make him into a "winner," he discovers that his fellow campers are competitive to the point of obsession, and that a particular teacher, Mrs. Maargh, takes winning very seriously.
Jordan and his sister Karla beg their parents to take them to a big carnival that has opened on the other side of town. When they arrive, the two kids are delighted by the rides, the sideshow, the interesting displays, and the great food booths.
Kat is reluctant to visit her Uncle Vic Frankenstein because of all the rumors about him. People in the small town where he lives say he's a mad scientist like his great-grandfather, Victor Frankenstein, who created a monster that came alive and terrorized the town. But Kat is relieved to find that even though he lives in a dark, old castle-like mansion, Uncle Vic is a quiet, gentle man, a scientist interested in building robots with artificial intelligence....
Billy and Sheena go with their Uncle, Dr. Deep, to search for treasure and are pursued by pirates who have been dead for two hundred years, and when Billy and Sheena return to land and visit Horrorland they encounter their worse fears.
When Amy needs a new ventriloquist dummy, her dad finds Slappy in a local pawnshop. Slappy's kind of ugly, but Amy's having fun practicing her new routine. Then horrible, nasty things start happening. Because there's something odd about Slappy. Something not quite right. Something evil.