Wonder Wheels City

In the colorful city of "Wonder Wheels," where the buildings resemble giant flowers, lived four close friends: Lightning, the fast blue police car; Flame, the brave red fire engine; Taxi, the friendly yellow taxi; and Mountain, the powerful monster truck. They spent their days roaming around and helping the city's residents. They were the heroes of this city.

Every day they have a difficult task and challenge; their mission is to keep the city of Wonder Wheels safe.