A Birdaloo tells True and Bartleby that a baby Yeti is about to be born, but when word gets out the kingdom goes wild -- and only a wish can fix it.
True, Bartleby, and Grizelda agree to "yeti sit" the triplets, but it is more difficult than they thought.
The Yetis bring True and Bartleby to their secret splash park and they accidentally upset the volcano, Mount Huffinpuff.
Two tribes of Yetis fight over the Scratching Stick.
The citizens don't understand Yeti traditions, and destroy their special lights; Snik, True, and Bartleby journey deep into the forest to find the magical Ni Ni Tree.