Set in an assortment of locations around the world, the series follows three teenagers (Mark, Debbie, and Tinker) and a talking dune buggy as they partake in various adventures. Speed Buggy, the dune buggy, was designed by Tinker and participates in racing competitions in order to collect winner's trophies. During their travels, the crew often defeats villains and crooks in order to save the world, such as diamond thieves, car-obsessed doctors, and evil pirates. Known as the "Speed Buggs", the group of three teenagers is able to activate Speed Buggy through the use of a portable walkie-talkie