The setting of this show is Taxitown, where the eponymous Big Garage is. Said garage is home to four taxi cabs, London, Yorky, Zigzag, and Mimi, who are always under the watchful eye of Pump, a gas pump who serves as their mentor. Close to the Big Garage is Scrapland, a scrapyard serving as the home of an anthropomorphic trash compactor named Scrap who wants to destroy the taxis and become the ruler of Scrapland and Taxitown. Scrap's helper, a tow truck named Rusty, alternates back and forth between being an enemy of the taxis and a friend.
