Eugène Milkman, nicknamed Milky, is an old robot, a small but really strong, who has delivered milk for 800 years for the Galaktos Company, through the entire Galaxy.

At the beginning of his new tour, he takes Craig McIntosh, a young trainee who has just left school, to ensure his training.

Both take off for a journey through the Milky Way; Milky evokes its memories of career while Craig discovers brilliant cosmic landscapes.

From stars to nebulas, this fantastic trip will drive them up to the dreadful black hole hidden in the center of our Galaxy …