Has Hacker finally found a way to take down Motherboard forever? All bets are off when Hacker stumbles upon the secret location of the "Program Proliferator" - a piece of hardware capable of reprogramming Motherboard's operating system. It's buried right under Dingerville Park, home of The Dingerball Series, a once-in-every-four-year championship game less than a week away. While retrieving the device, Hacker suctions up all the ballfield's dirt, leaving a giant crater in the ground-and in the hearts of all Cybercitizens. No one is more distraught than Lefty, the local seven-year-old pitcher Matt's been mentoring. The CyberSquad must figure out how to refill the missing dirt before the big game! Could composting lead to a home run?