Véra and Rémy try to decipher the language on the answering machine, while Didier goes back to the swamp with Claire to understand how the cotton candy works. He finds out that the magical powers of the cotton candy are triggered by a song by François Duluc, who is now a singer! Claire and Didier are convinced that they have made a revolutionary discovery: cotton candy that generates infinite energy when it comes into contact with music!

Véra wants to use her mind to help the aliens prevent the impending catastrophe, while Didier, who takes a more practical approach, tries to find the star that is about to explode. So he takes advantage of a visit to his daughter Diane's university to explore the library's extensive astronomy section.