The movie begins in space, on a space station. A space team called, TENKA, was testing a super-powered weapon on a deserted planet. It worked, so they celebrated. But Galaxy King saw this, and decides to attack the space station.
When a new threat from outer space called Galaxy King arrives on Earth seeking an equation for a new type of energy, Skyrider, and the other seven Kamen Riders join forces to fight off the new foe and the armies of Neo-Shocker.
罗门博士在宇宙开发出了新的氢能，但在往返地球的途中却遭到银河大帝所乘飞碟的袭击。博士让爱犬带着氢能方程式回到地球，但爱犬却在回到地球后被新修卡的怪人抓获。得...
羅門博士は石油にかわる新しい水素エネルギー、シグマを開発し宇宙での実験に成功するが、銀河王の円盤に襲われてしまう。羅門博士は死ぬ直前、犬のエレナに催眠をかけシグ...
