The third season of .

The Celestial Railroad is a fantastic journey of a boy, Giovanni, in a dreamscape created into a colorful full-dome CG animation picture with inspiring background music. Based on a story written in the early 20th century, KAGAYA, a digital fine artist, has breathed new life into the unique imaginary world using creativity and precise astronomical knowledge. The starry sky is depicted as the Celestial Field made up of a river, a field of silver grasses, flowers, birds, survey towers, railway signals and more. Across this amazing beautiful scenery, the Celestial Railroad runs along the Milky Way.

Urey is a boy who lives in a laboratory in a lake with an old man. One day they find a strange star in the Little Dipper. The stars are disappearing and the Little Dipper changes into a fish shape. To save stars, they begin to sail across the Milky Way to the place where the strange fish lives.

The anime illustrates how the three protocols/standards handle a request (an online video purchase) from the user by handing off packets of data between them.