Grindhouse styled short about revenge.

Since her parents passed away, Princess Mona lives by herself in a castle with two hideous, ghastly characters, Goomi and His Lordship. One day her sobs draw the attention of a unicorn, called U, who wants to comfort and protect Mona for as long as she needs. U becomes Mona's companion, her confidant and her inseparable friend. While Mona grows into a beautiful princess, a group of charming, peaceful and fanciful Yeah-Yeah’s settles in the neighboring forest. They have no particular special powers, yet they soon bring about major changes in everyone's lives, especially in Kulka, the dreamy musician.

15-year-old Max is in search of his father, the famous troubadour Johnny Bigoude, who disappeared shortly after Max's birth. He reaches Saint-Hilare where Madam Doudou, the old teacher, takes care of him and finds him a job as elevator musician in the fly swatter factory Bzzz & Co. But the factory doesn't run well and half of the village gets fired. To boost the swatter sales, a dangerous scientist creates a mass production of flies. Soon, a thick cloud of insects attacks the village... With courage and determination, Max and his new friend Félicie will do their best to neutralize the insane projects of Bzzz&Co. Will they manage to convince the villagers to help them in this adventure? All together will they stop the scientist's crazy handlings? And will Max find his father?