Dr. Carr's apologetic for the true presence of Christ in the Eucharist is divided into two parts: Evidence that the Eucharist is the true presence of Christ (Part One), and the implications of that evidence (Part Two). In Part One, Dr. Carr defends the reliability of Sacred Scripture, then demonstrates that Old Testament prototypes, claims made by Christ in John 6 and at the Last Supper, the reiteration of those claims by St. Paul in 1 Cor. 11, and the Eucharistic teachings of the early Church Fathers, all point to the same reality: that when bread and wine are consecrated by a validly ordained priest in the context of the Catholic Mass, they become the body and blood of Christ. Dr. Carr then turns to verify the cogency of these claims by harnessing the explanatory powers of both Aristotelian metaphysics and quantum physics, before examining in detail the most prominent of the Eucharistic miracles, along with miracles recorded in response to Eucharistic reception, including displays of heroic virtue, supernatural strength, and dramatic conversion. Part One ends by answering the question, Why do satanists almost exclusively attack the Catholic Church, and the Eucharist in particular? 

Part Two unfolds the implications of the Catholic view of the Eucharist. Here the patristic doctrine of theosis (divinization), repudiated by most Protestants, suggests that if one desires the fulness of sanctifying grace, and thus maximal preparation for one's judgment by Christ, one must receive the Eucharist. Two primers are then given on how to become a Catholic and, once Catholic, in what manner the Eucharist ought best to be received.