十年“欢喜冤家”猪鸟依旧如往常一样“互相拆台”。然而，“不速之客”发射冰球袭击了小鸟岛和猪猪岛，令双方不得不放下芥蒂，小鸟岛昔日英雄胖红联合小鸟伙伴们与曾经的对手“捣蛋猪”雷纳德一行组建了临时联盟，他们将前往全新冰封岛屿上阻止神秘反派的灭世计划。After saving Bird Island from an all-out green-pig invasion in Angry Birds (2016), the isle's always cranky local hero, Red, still finds himself doing battle with Pig Island. As the prank war between pigs and birds is raging, massive icy projectiles coming from the feathery tyrant Zeta's ice-capped Eagle Island threaten the security of both havens, unless Red and King Leonard agree to form a difficult but honest truce. Now, Red, Bomb, Mighty Eagle, Chuck, and his brilliant sister, Silver, have to join forces with Leonard's mighty porcine team to thwart the megalomaniac Zeta's bold schemes for world domination. However, is Red capable of change?