It was Peter's idea to invite his friends on a joyride on Justus' birthday of all days. In pouring rain, a car breakdown forces the three detectives to seek refuge at the creepy "Blackstone" castle. When lightning knocks out the power line, the three investigators are stuck for good. It soon becomes clear to the three junior detectives that the lord of the castle, Count Gallagher, is a real chess fanatic. But not only that - the old castle makes a spooky impression and then there is Moe, the co...