In the year 2039, mankind has found a pure, clean, and infinetly recyclable power source known as the Shizuma Drive. It has served its purpose well, until now. Big Fire, a power-mad underworld organization, has found a way of making all Shizuma Drives inoperable. Luckily, a branch of InterPol, known as the Experts of Justice, have discovered this scheme. Now only Daisaku Kusama, a young Expert member, must control Giant Robo to battle the evils of Big Fire.