Dr. Marbles is captured by Hacker and taken to Castleblanca, a cyberspace version of Transylvania. Hacker’s goal: transfer Marbles’ brainpower into his newly-built robot named Megabyte! Summoned by Motherboard, the kids and Digit arrive with the knowledge that Hacker has taken Marbles to a castle – but which one? There are hundreds and hundreds of castles. To find Marbles, the kids must master the art of properly collecting data, organizing it and graphing the results – which are sometimes suprising! The Big Idea: Data is a lot more than a collection of numbers. When you gather it, organize and analyze it, you can discover useful information hidden in the numbers.