"The Book of Eli" is a story about a man named Eli living in a post-apocalyptic world caused by nuclear war. He guards a sacred book, believing it holds secrets that can help rebuild society. Along his journey, Eli encounters various characters, including Carnegie, a local tyrant, and Solara, a young woman eager to uncover the truth about the world. In the end, Eli sacrifices his life to protect the book, demonstrating the power of knowledge and faith.