When the mouse family discover someone, or something, has taken a big bite out of their cheese car, Huckle promises to figure out who is putting the bite on the mouse family. Ultimately he finds the culprit by matching the teeth marks to the hood of the Busytown Dentist?s car which has accidentally bumped into the cheese car. The kids witness someone rescuing Granny Goat from the train tracks. After the train passes, the hero is gone. Granny Goat didn't even get a chance to thank him. Based on their collective memories of what he looked like, Huckle and the gang create a composite drawing to help them find the hero.