A reclusive, temperamental outcast bird named Red lives in a village on Bird Island with other flightless birds. When his temper causes a "preterm birth" of another bird's egg, he is sentenced to take an anger management class. Red's classmates – Chuck (who is hyperactive and can move at hypervelocity) and Bomb (who can cause explosions with his anger and fear) – try to befriend him, but he avoids them.
The war between the Angry Birds continues as they begin a new adventure, this time against the Bad Piggies, in a fight to save their homes.