Somewhere in the mysterious mountains of Tibet lives a mysterious creature - Yeti, Bigfoot. Few have seen it, but the elusive yeti is being hunted. Only a team of young and very brave researchers can save an amazing animal. Inventive Valiant, unpredictable Sheila and fearless Violet go to Tibet on a mission to keep Bigfoot alive. But very soon it becomes clear that this expedition is not a pleasure walk - there are too many dangers and too many people who want to make money on the secrets of planet Earth.