A disguised Minion Pig manages to infiltrate the Blues, but will the little Angry Birds fall for his ruse?
The Blues are playing with a frisbee as Chef Pig watches from the bushes, he see's the Eggs and sends a Pig dressed up to look like a Blue Bird. They see a Minion Pig that was sent in by the Chef Pig wearing a fake beak and a Blue costume, pretending to be a Blue Bird. The Blues realize that he is not a Blue Bird, and decide to have a bit of fun with him anyway. The Pig wants to join them in playing with the disk, but the Blues throw it directly at his face.
Afterwards, the Blues get on a skateboard on top of a cliff and ride down, and encourage the disguised Pig to do the same. Worried, he rides down and crashes. The Blues then take the pig to a pond. Wearing swimming caps, they dive into the pond, though the Pig fares not as gracefully. But the Blues aren't done yet — they go on to play several games, all of which injure the Pig.
Eventually, with the Chef Pig still watching, the Minion Pig attempts to steal the Eggs, but the Blues take the Piggy to the Slingshot, which disappoints Chef Pig. The Blues take off the Pig's fake beak, revealing they knew all along that he was a Pig. The Blues then launch him far away, and the Chef Pig's plan fails.
Then the disk from earlier lands near the Chef Pig, frightening him, and the Blues close in.
As the credits show, the Blues launched Chef Pig by using the Slingshot.