Ray is a young wunderkind inventor living in Victorian England. His life is turned upside down when he receives a special package hailing from the United States, sent by his grandfather, Lloyd Steam. The package contains a device called a Steam Ball, a device so powerful that it can drive any machine that requires steam with a nearly limitless amount of energy. Ray is instructed to not let the Steam Ball fall into the wrong hands, which include the mighty O'Hara Foundation, who desperately want to bring the Steam Ball back into their control so they can achieve their less than noble goals. He will need to use every bit of his brilliance in order to dodge the countless goons that are sent to snatch the device from him. It will be a battle between good and evil, a battle for redemption, a battle for the future!

Nao, an 8th grader, is one of the only two members of a Digital Camera Club, where she also serves as the manager. It's a mystery that she shoots nothing else but the skies and clouds. One day, she finds a cat on a rooftop where she usually shoots her camera. It's a cat that knows how to manipulate the flow of a wind. Shocked to find a strange animal, Nao loses her footing and falls off from the rooftop! Miki is the other member of the club, and also Nao's best friend. Mr. Taiki is the teacher who's taught the cat how to manipulate the flow of a wind. Ryoko is a girl who has a huge crush on Mr. Taiki. And there's Jun, who helps Nao and Miki look for a cat that can fly. Then, there's Yukio, who is the widow of Mr. Taiki's deceased brother. On the outskirts of this big city, a town off the "Wind Handlers," has been formed—and a mysterious Wind Festival is about to begin... (Source: Production I.G)