There is no longer good weather in the world. It is always bad and gloomy, so people are sad and depressed. They want to get rid of this curse. Because of this reason, People created a white cloud to end it and trained him as a super light and strong warrior. Then they gave him a magical rainbow sword remaining from ancient times. Rainbow sword and white cloud is the only hope to bring back good sunny days, so they rise to sky to battle with bad weather and their epic adventure begins.