Dr Marbles is captured by Hacker and taken to Castleblanca, a cyberspace version of Transylvania. To find Dr Marbles, the team must collect, organise, and analyse data.

Disguised as a gypsy, Hacker lures Digit to a cyber amusement park and holds him captive. When the kids arrive, they analyse the fairness of the park's games to outsmart Hacker.

Hacker steals the powerful sunisphere from Solaria, causing the cyberworld's sunny holiday paradise to be covered in snow, so the team use estimation to recover the device.