Viewers of "Ring of Fire" will come heart-stoppingly close to the great circle of volcanoes and seismic activity that rings the Pacific Ocean. Spectacular volcanic eruptions are featured, including Mt. St. Helens, Navidad in Chile, Sakurajima in Japan, and Mt. Merapi in Indonesia. Extensive aerial photography and computer animation help tell the story of the geologic forces that impact the ring and the lifestyles of the people who dwell on its fiery boundary.