Matilda finds a spot to practice her saxophone away from the complaints of the other birds, but she's soon upstaged by a slick piggy horn player. There's only one way to settle this – BATTLE OF THE SAXES!
The story starts with Matilda finding a saxophone in a case. She experiments with it and she is delighted. She then sees a pig playing a saxophone to a small crowd of Minion Pigs. All of the pigs enjoy it. Matilda comes on stage and shows him her saxophone. He laughs and all of the pigs join in, making her feel sad. The sax pig blows a raspberry at her which makes her angry and starts playing her saxophone, which makes the crowd run to Matilda. The sax pig is surprised about this as she plays beautifully. Determined to regain his fans, the sax pig shouts to some pigs backstage.
The backstage pigs make an archway with lights, which all the pigs like. This makes Matilda really angry. She plays loudly so the pigs can hear and fireflies appear behind her. She plays the Angry Birds theme song, which the pigs like. They show signs with Matilda on them and rush to her. She jumps on a cliff and then onto her stage. This makes the sax pig surprised as Matilda does a crowd surf. The sax pig shouts to the backstage pigs and one of them pulls a lever to turn on a motor. Then, a huge stage appears with the sax pig on a spinning turntable. A pig dressed as a shark appears. This makes the crowd of pigs show sax pig banners and cheer him on. One of the backstage pigs appears with a nail. Then, the cog in the motor detaches, which makes the turntable spin superfast. Guilty of what they have done, the backstage pigs packed up their bags and left, leaving the stage to explode, sending the sax pig soaring into some rocks which crash onto of him. All of the other pigs are confused about what happened, so Matilda plays for them. The pigs hold up Matilda banners as she plays.