The narrative of "La Luna" culminates in a significant plot turn that resolves the film's central conflict. After ascending to the moon, Bambino, Papà, and Nonno begin their work of sweeping up the small, glowing stars that litter the surface. The conflict between the two men escalates as they argue over which broom Bambino should use. Their bickering is interrupted when a colossal star crashes into the moon, embedding itself near the top. It is far too large and heavy for either Papà or Nonno to move with their respective brooms, and their established methods prove useless.
This is the moment of Bambino's transformation. He observes the situation, and with a newfound resolve, he turns his cap backwards—his own way. He confidently climbs the giant star, pulls a hammer from his pocket, and taps it decisively. The star shatters into hundreds of smaller, manageable stars. Bambino then chooses a rake, a tool different from both his father's and grandfather's, and begins efficiently clearing the new stars. Awestruck and humbled, Papà and Nonno wordlessly acknowledge their son's wisdom. They abandon their bickering, pick up their own tools, and join him, working together in quiet harmony. As they sail home, they look back to see their work has transformed the full moon into a perfect, glowing crescent. The ending reveals that this family's magical job is the very reason for the moon's phases, and that Bambino has not just learned the trade but has improved it, uniting his family in the process.