Somewhere deep in the heart of the Pacific Northwest is a wooded glen known as Wetmore Forest . . .

The big race is on at the Harvest Festival in Wetmore Forest This year, Chester McFreckle and his pet slog, Newton, are competing for the first time. Chester is a clever monster and he has made a few special adjustments to their cart. With the finish line nearly in sight, it's time for Chester to try this new invention out. Will it help him win the slog racing championship with Newton?