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.

Shep Mooney discovers a ghost is living in his basement, but his spooky problems get even worse when the ghost of Slappy, the world's most evil ventriloquist dummy, shows up.