In Happy Feet Two, Mumble's son Erik is afraid to dance but finds his own unique way to help his dad and the penguin nation save themselves from a massive snowstorm.

In a world where Emperor Penguins find mates through song, Mumble is born unable to sing but can tap dance. As he grows up, he faces ridicule from the elders and is eventually exiled. Along with a group of Adelie penguins, he goes on a journey to discover the origin of a human artifact. Mumble finds himself in captivity at Sea World but escapes and returns to his colony. With the help of a research team, Mumble's dancing leads to a global movement to ban overfishing in Antarctica.