On the tip of the top of a mountain all snowy, where the ice-swirling, toe-curling blizzards were blowy, in a herd full of huddling yaks, big and small, lived Gertie . . . the littlest yak of them all. Gertie is the littlest yak in her whole herd, and she’s feeling stuck in her smallness – she wants to grow UP and have bigness and tallness! But when it turns out that there are some things that only Gertie can do, might she come to see that she’s perfect, just the way she is?