The narrative begins with a logistical feat of gargantuan proportions. Under the direction of the protagonist, earth diggers are mobilized to construct a "colossal hole" specifically designed to "accommodate nine fifty-foot giants." This operation serves as a decisive solution to the terror caused by these "foul man-eating giants" who had been "guzzling human beings." By successfully capturing and containing these creatures, the BFG, alongside Sophie, transforms a source of global fear into a spectacle, as "tourists from all over the globe came flocking to gaze down in wonder at the nine horrendous man-eating giants in the Great Pit."
To manage the captives, the BFG implements a strict dietary regime. Recognizing that the giants were accustomed to eating humans—a behavior he explicitly condemned by stating, "I is always warning you not to do it"—he introduces a permanent substitute: "repulsant snozzcumbers." To ensure this is a long-term solution, the BFG provides a "whole bungle of snozzcumber plants" to the royal gardener. This act of foresight ensures that the giants are fed only "disgustive" vegetation, serving them "right, left and centre" for their past atrocities, effectively neutralizing their threat through forced dietary discipline.
Following the resolution of the immediate crisis, the story shifts toward the personal growth of the BFG. Despite being told by the Queen that he is "not very well educated," she acknowledges that he is "really nobody's fool." Encouraged by Sophie, who volunteers to give him daily lessons, the BFG embarks on a journey of self-improvement. He evolves from a giant who speaks in a unique, non-standard dialect into a "great reader" who begins to "write essays about his own past life." This intellectual awakening is a testament to the BFG’s latent potential, proving that his lack of formal schooling did not preclude him from achieving literary success.
The climax of the BFG's personal development occurs when he decides to document his experiences in a book. With Sophie’s guidance, he writes his story, which the Queen finds "perfectly charming." The narrative takes a meta-fictional turn at its conclusion: the Queen writes a formal recommendation to a publisher, enclosing the manuscript written by her "very dear friend" who, out of shyness, uses the pseudonym "Roald Dahl." The Queen’s endorsement—"I am very much of the opinion that this story should be published so that everyone can read it"—serves as the final seal of legitimacy for the BFG’s work. The transcript concludes with the realization that the very story the audience has been listening to is the "whiz-popping" manuscript the BFG wrote, effectively blurring the lines between the character and the author, and cementing the BFG’s legacy as a writer who transformed his "foul" past into a celebrated literary contribution.