After millennia, mammoths have returned, brought back by scientists to help combat climate change.
Ash Grimes, born and raised at the Arctic research centre responsible, dreams of becoming a Mammoth Rider, just like her dad. But mammoths are wild animals and it isn't easy to earn their trust.
So when Ash meets a white mammoth calf, the first of its kind, she's determined to do anything to protect her new friend. With a trophy hunter threatening the safety of the herd, Ash, along with best friends Ruby and Jack, must race across the tundra to save their families, the rare calf, and the very future of the mammoths.