In the Victorian era, the British Empire is bustling with the energy of the steam-powered industrial revolution. Following in the footsteps of his famous family of inventors, James Ray Steam enjoys his youth in Manchester helping at local factories and stealing components for his own creations. One day, he receives a package containing a strange ball with an attached valve from his grandfather, who has been working in the United States alongside Ray's father. However, it is not long before people from the O'Hara Foundation storm into his house demanding he hand it over. Confused and afraid, Ray attempts to flee to the home of his grandfather's colleague, Robert Stephenson, with pursuers hot on his trail. While Ray seeks to piece together the secret of the ball and discover the power it contains, it seems practically everyone in the British Empire is ready to seize it from him.

During Japan's Taisho Era (1912-1926), a scientist named Ayanokoji developed the Steel Angel - an artificial humanoid with superhuman physical abilities. While the Imperial Army wanted to use the Steel Angel as a new means of modern warfare, Ayanokoji wanted his creation to be a new step in the future of mankind. Thus, he defied orders from the Army and secretly made the Steel Angel codenamed Kurumi. Then one day, a young boy named Nakahito Kagura snuck into Ayanokoji's house as a dare by his friends and stumbled upon Kurumi's lifeless body. A sudden attack by the Imperial Army shook the house, causing Kurumi to fall on Nakahito. At that moment, their lips met, and Kurumi woke up from the kiss that started a miracle. (Source: ANN)

In the story, a mysterious giant tank rocket begins stealing resources from various planets. On Earth, Yuuna and Boogoo get involved in the incident and disappear. In order to save Yuuna, Stitch teams up with Tiira. Yuu Aoi will guest star in the special as Tiira, an information analysis robot from the Galactic Federation. (Source: ANN)

To confront a planetary war at the sand planet of Katuuna, Stitch must leave Yuna and Earth behind. (Source: Wikipedia)