All the students at Swedhump Elementary are thrilled -- not just because it's Friday, but because they are in for a big treat. Their invisible principal's husband is a world-famous inventor, and today he's brought his enormous Ice Cream Machine to end the week on a sweet note. But wait! There are forces -- very evil forces -- who don't want the kids to get any ice cream. In fact, the school is soon under attack from some highly annoying anti-ice-cream intruders. Only one person can prevent the school from being served three scoops of total disaster: Dash. He and his friends are going to make sure the bad guys get licked before they can melt all the fun.