Polar Bear, Panda, and Penguin go to a water park. Penguin takes along his nephew, but ends up being cowed by Mama King Penguin, while her son and Penguin's nephew become fast friends. The Penko sisters have also tailed Penguin there, while Panda is on the receiving end of King Penguin Mama's grousing about how emperor penguins (like Penguin) are considered superior — and a trio of Pygoscelis penguins out to sell penguin cards. Sasako, on the other hand, rode the train too far and arrives late at the water park. After becoming amazed by the taste of Polar Bear's Café's brand of black coffee, a man named Masaki decides to become the pupil of a tree kangaroo in order to learn how to roast coffee beans.