Roky is a cute little robot who got lost in the Universe. Fortunately, he managed to land in the house of the two siblings, Matilda and Horatiu, two mischievous kids who live with their grandmother.
Roky is worried that his mother does not know where he is, but by learning about life on Earth, he becomes friends with the two children, having a great time. A big fan of cocoa with milk, Roky will want to take the recipe back to his planet and the fond memories will make him promise to return to Earth.