Hare brothers Peter and Lapin visit a jungle temple in search of the mystical Hamster of Darkness, but are unsuccessful in their quest.

As he grows up, Chickenhare becomes enamored with plans to follow his father's footsteps as an adventurer, but also struggles with self confidence, as he is ostracized by his peers for being different.

Undeterred, he decides to search for the Hamster of Darkness to prove himself as an adventurer and visits Lapin, who has been imprisoned after attempting to overthrow Peter as King of Featherbeard but has information on the artifact.

The group is later captured in a bamboo forest by Pigmies, tribal pig-like creatures who mistake Chickenhare for a god, and the leader commands them to prepare a feast.

Lapin and his crew arrive and take the scepter, summoning the hamsters' ghosts to take over Featherbeard and leaving the trio stranded in the temple.

Chickenhare decides to destroy it and runs to the Royal Adventure Society testing grounds, hoping to drop the scepter into the massive pit beneath the arena.

After some time, Chickenhare decides to become an independent adventurer with Meg and Abe, and Peter gives him his treasured golden machete as a sign of support.

Benjamin Mousquet, who made his directorial debut with Stassen after working at the studio as an animator for many years, was immediately drawn to the film's themes of inclusion and friendship.

For this film, the band broke away from its signature pop sound and explored a whole new style with the help of a classical musician, Pavel Guerchovitch.

Chickenhare and the Hamster of Darkness world premiere took on January 23 at the Gaumont Champs-Élysées theater in Paris, later the film opened on February 16 in France, Belgium, the Netherlands, and Luxembourg.