In the wake of the devastating war against the RDA and the loss of their eldest son, Jake Sully and Neytiri face a new threat on Pandora: the Ash People, a violent and power-hungry Na'vi tribe led by the ruthless Varang. Jake's family must fight for their survival and the future of Pandora in a conflict that pushes them to their emotional and physical limits.
Set in a post-apocalyptic future where an event known as "The Quiet Rapture" caused all known stars and habitable planets in the universe to disappear, a convict is sent to search an ocean of blood discovered on a desolate moon, using a small submarine nicknamed the "Iron Lung".