Ellery Queen finds himself in charge of the young rambunctious lad, Djuna. What better way to spend his time than at the newly opened amusement park called Joyland. But the park's designer pride and joy is his "House of Darkness". A haunted house that reminds Queen of the set of Dr. Caligari. But what terror does the darkness hold? Ellery Queen and Djuna is about to find out!