Mumble , the once-outcast tap-dancing hero, is now a father struggling to connect with his son, , in the frozen world of Antarctica. Unlike his father, Erik is "choreo-phobic" and reluctant to dance, leading him to run away from home toward Adélie-Land.
The family drama is interrupted when a catastrophic shift in the ice traps the entire Emperor Penguin colony behind massive ice walls, cutting them off from their food source. Mumble must find a way to save his people, leading him to recruit unlikely allies: Mumble , the once-outcast tap-dancing hero, is now
: In a parallel existential journey, two tiny krill named Will and Bill (who have left their swarm to find meaning) find themselves beneath the ice, contributing their own rhythmic vibrations to the rescue effort. Mumble must find a way to save his