Across this charred land strides our Christian cowboy, Eli (Denzel Washington), a mysterious, solitary man who carries the last remaining Bible in his backpack. He also carries a gleaming silver knife and a shotgun, both of which he's expert with.
Like a prophet, he has heard God's voice in his head and he walks West with divine determination. He says to himself: "Stay on the path."
After "the flash" of the cataclysm that rocked the Earth, many blamed the troubles on religion. All the books were burned, making the few that remain precious cargo indeed.