The opening shots are like something out of a Western. A seemingly endless sky. A row of lopsided power lines. Saltbush. On the soundtrack, the wind whistles across the plain, while a sombre, sonorous voiceover intones:

"My father once told us that water didn't always burn. That you could drink it as it was falling. But that was long before his time, before the earth took its last breath and, with it, began to die."