The book focuses on the sanctity of the blood, especially as blood is the required payment for sins, which applies to everyone ever born. A key verse is found in Leviticus where it is stated: "For the life of the flesh is in the blood and I have given it to you upon the altar to make atonement for your souls; for it is the blood that makes atonement for the soul." Leviticus 17:11 NKJV
The book begins by detailing all Old Testament offerings which required blood, and then details the seven sacred feast days for the Israelites and the part that blood played in each of them. Following the part that blood played in offerings and sacred feast days is a discussion relative to the part that blood played in ratifying covenants. And then the book provides a detailed account of the requirements of the Mediator and High Priest. The final chapter of the book details the ultimate blood shed of the Lamb of God who offered Himself and His blood to pay for the sins of the world.