The very first Gear ever made in the world is stolen. The gear, named Kaiservern, beats the prize winners of the Australia convention one after another. Kouya and Manganji, who won a prize in the Asia Convention, become targets too. When the unidentified gear fighter who handles Kaiservern appears in front of Kouya and Manganji, the two boys decide to fight together to win a victory over their enemy.
Source: Official website