“In words, Isidor. That’s where the magic lies!” It is the best, the most important job in the world.

The great dream of little Isidor: to guard the invisible rope of the moon. To tirelessly patrol the rooftop, testing the rope with his hand to see if it is tied well… Bella does it every night!

But the wizard Livorno always tells him no. He trembles at the thought that the knot might come undone and the moon will drift far away. And then, goodbye world. The caliph will not show them mercy.

But Isidor has made up his mind. He will become the guardian of the moon, even if the world falls apart. For one night. Even just for one night…