Vampires hanging out in the living room, Dr. Frankenstein in his lab, and a good witch who wants her stolen broomstick back: Rob and Kelly thought their vacation at grandpa's would be boring, but instead it's filled with thrills. That's because the house is haunted! On their very first evening the kids fall through a trapdoor and discover a weird world below. Off they go on an obstacle course through bats, traps, a cellar full of rats, and a spooky band of skeletons making music. How well can you navigate through this wonderfully creepy and strange universe?