In the most popular national park in world Ranger Tok has to solve a mystery that could cost him his life, and the lives of thousands of others. Yellowstone has over a million visitors each year, and there are many people who end up getting killed from the many dangers in the park, but Ranger Tok discovers that there is more to the mystery than visitors getting killed. The mystery involves Yellowstone being a super volcano and ancient Native American myths of the legendary shape shifters. Will Ranger Tok be able to save the entire western United States, or will he end up being part of the worst natural disaster caused by men ever.