Something happened 30ish years ago that wiped out civilization.
Eli is lead by faith to carry the last copy of the bible through the wasteland, to an unknown destination in the west. He kills anyone who tries to stop him. He walks into a town controlled by Carnegie. Carnegie hires thugs to look for the bible and wants to hire Eli. Eli refuses and the young Solara is sent to change his mind. Eli leaves and kills a bunch of Carnegie's men in a shoot out. Solara follows Eli and Carnegie chases after them. After a shootout at a house in the middle of nowhere, Solara and the book are captured and Eli is wounded. Solara escapes and goes back for Eli. The two continue to Alcatraz island where things from the old civilization are preserved.