Blas’s mother simply can’t understand it. It can’t be possible that a bat is helping a mouse! Yet it’s true. Lúa, a young female bat, is teaching Blas the mouse to look at the sky, to observe the birds and the stars. At the same time, Blas is helping Lúa to explore the earth and appreciate its flowers and animals. Both friends love the new things they are discovering in a world that was previously unknown to them. Since they have become friends, they share and enjoy both.

Besides, looking at the sky turns out to be a great help for Mother Mouse, who finally realizes that bats and mice can be friends in spite of their differences. It’s a good thing that children are always around to remind adults that friendship is the most important thing there is!