Synopsis
A long time ago, the planet Machina was home to an advanced race of mechanical beings called Metal Cardbots. When Machina abruptly broke apart, the Cardbots escaped to Earth, where they disguised themselves by turning into ordinary vehicles to stay hidden. In the present day, Jun, a passionate BMX rider in elementary school, discovers the Metal Breath, a device worn on the wrist that enables him to capture Cardbots and grant them enhanced abilities.
