When a yeti named Mawei hears a car crash on a mountain road in Northern California, she decides to investigate. The wheels are still spinning on the half-crushed, upside down car at the bottom of the gorge. A man and woman have been killed in the wreck, but their child is alive and unharmed, hanging from a car seat in the back. Her name is Helena.

With a snowstorm on the way, Mawei knows that the little girl won't survive on her own. An ancient rule of yeti culture forbids contact with humans, but she takes the child anyway. How hard could it be to get the child back to the world of the humans?

It turns out to be a lot harder than Mawei thought, and when the wrong yetis find out what she's up to, the race is on to get the little human to safety before they catch up to her...