Scott “Buck” Buckley, an environmental scientist, accepts a job at the McMurdo Antarctic research station. After signing a secrecy declaration, Scott discovers the existence of Geyser Valley, an area with a unique warm microclimate, which is home to the mysterious indigenous Anai people. In an outrageous conspiracy, the world governments are keeping the existence of these people a secret, to avoid limitations on the division of land for natural resources.
Scott is fascinated by the unique culture of the Anai as he visits and learns from them. In the meantime, the world becomes more and more unstable while a global war is about to break out. Just before darkness sets over Antarctica, warfare tears the world apart, and the research station finds itself completely isolated for the long and sunless winter.
In the loneliness of the dark season, Scott faces difficult questions: who are the Anai, and how did they come to Antarctica? How much truth is there in their legends about giant ancient reptiles frozen in ice, waiting to come back to life? How is McMurdo going to hold on until the communications and supply lines are restored? And what limits one is not allowed to cross, even in the name of survival?