It's Halloween in Castleblanca -- night of the big party, the Halloween Howl. Hacker has taken over the Mayor's Castle for a candlelight dinner with Erica Ram, all designed to make Wicked jealous. But the Mayor returns and wants Hacker out! Hacker brings the castle's stone gargoyles to life, capturing the Mayor and imprisoning him in the dungeon. The kids and Digit must master division to rescue the Mayor, deal with the gargoyles, and save The Halloween Howl!