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For the sake of change, Mrs. Toubon replaces Hugo on the drums and Hugo cooks in the trailer, everyone switches roles. Bémol and Octave almost try new snacks. Dario doesn't want to do any more shows.

Bémol and Octave learn that Mr. Lavoie is preparing a show. They both believe that he wants to participate in the Hipaloulas' show.

While Hugo plays a trick on Bémol and Octave by making them believe that there is an owl in the park, Mr. Lavoix is so excited by the idea of showing Dario that being a park warden is fun that he gets into trouble!

On this day when he loses a tooth, Octave learns about the tooth fairy. He tries to take an early nap, so that the fairy will pass by more quickly. Even if it doesn't work the first time, a surprise awaits him.

Mr. Lavoix introduces Bémol and Octave to the joys of sports. Bémol would like to run a marathon, but since he's really out of shape, Octave decides to help him by becoming his personal trainer.

Mrs. Toubon wants to offer her special Hipaloulas cake to her friends, but she is always disturbed by Octave and Bémol who play ni oui, ni non . Léa prepares a gumboots choreography that inspires Octave and Bémol while Hugo does exercises to improve his d

As the Hipaloulas are invited to play at a music festival and Bémol successfully helps Mr. Lavoix build his birdhouses, Octave becomes aware of each of his friends' talents and suddenly wonders what his own is.

Like his hero, Brontoutou, Bémol would like to have a pet. Trying unsuccessfully to tame a squirrel, a skunk and a pigeon, Bémol resigns himself to "imagining" his pet until Octave gives him a butterfly of his own making.

The Hipaloulas' speaker is mute after Bruno the squirrel mistook it for his pantry. And without a speaker, there is no music. And without music, there is no Hipaloulas show!

Wanting to thank Mrs. Toubon for everything she does for them, Dario, Hugo and Léa offer her a day off and propose to do everything for her. To their great surprise, they discover that Mrs. Toubon really does do a lot in a day!

Several clues lead Bémol and Octave to believe that the Hipalouparc may be the mysterious forest where the story of Hansel and Gretel once took place.

Octave and Bémol are in the throes of excitement before going to see a circus show and cause disasters. They discover that music can calm them down, and also restore their good mood.

Wanting to succeed in their new detective game 'Super Canines', Octave and Bémol practice observing and smelling in order to live up to their heroes. In the process, they discover a strange object, a tuning fork, that Dario was looking for.

Léa and Dario try everything to make Hugo believe that luck exists but, to make matters worse, all their attempts seem to fail!