The Extraordinary Education of Nicholas Benedict

Nine-year-old Nicholas Benedict, a skinny, towheaded orphan with an unusually long nose and bright green eyes, arrives at Rothschild's End, an orphanage housed in a crumbling country manor near the small town of Pebbleton. Nicholas has narcolepsy, a sleep disorder that forces him into sudden naps, and a related condition called cataplexy, which causes him to collapse when overwhelmed by strong emotions. He keeps the cataplexy secret, knowing from experience that bullies will exploit it. The Manor's director, Mr. Collum, a rigid, penny-pinching administrator struggling to restore the institution after his corrupt predecessor squandered its funds, assigns Nicholas to a locked room on the deserted second floor, with the window sealed shut.

On his first night, Nicholas encounters the Spiders, a trio of older bullies led by Moray, who intend to "initiate" him. Nicholas tricks them into believing Mr. Collum is nearby and sends them fleeing. He knows he has made permanent enemies but refuses to submit. That same night, he presses Mr. Collum's skeleton key into warm candle wax to create a mold, and the next day he secretly forges a duplicate during a metalworking activity so he can leave his locked room at will. He also fashions a hidden opening in his sealed window, disguising it with a removable papier-mâché section.

John Cole, a solemn 12-year-old with chicken pox scars, becomes Nicholas's first real friend. John warns him about the Spiders, walks him through the Manor's routines, and later creates diversions to help Nicholas in his investigations. The Spiders order all the other children not to speak to Nicholas, leaving him isolated during the day.

Nicholas discovers the Manor's library, three walls of floor-to-ceiling books, and is so overwhelmed he nearly collapses. Having had almost no access to books in his life, he begins sneaking downstairs at night to read voraciously, devouring volumes on science, engineering, and mechanics. During one nocturnal visit, he reads Mr. Rothschild's diary in the library and the marginal notes Mr. Collum has scrawled throughout it. The diary, written by the wealthy man who built the Manor and left it as an orphanage after his wife Diana's death, mentions that Diana possessed a beloved "treasure" she kept in a "treasure chamber." Nicholas discovers that Mr. Collum has been secretly searching the Manor for this treasure, tapping walls and sounding floors, hoping to solve the orphanage's financial crisis. John tells Nicholas that Mrs. Rothschild's inheritance from her father, worth millions, was never accounted for after Mr. Rothschild died. Nicholas becomes consumed with the idea that finding this treasure could free him from orphanage life.

Following clues in a library book on astronomy, where Mr. Rothschild scribbled notes about telescope construction, Nicholas discovers an overgrown stone observatory on the hilltop behind the Manor, which he names "Giant's Head." Its telescope has been stolen, but three mechanical cranks still operate retractable roof panels and a turntable. Nicholas theorizes that a secret combination of the cranks might reveal a hidden chamber. On a bluff beyond the observatory, he and John encounter Violet Hopefield, a deaf 13-year-old from the neighboring farm whose brother died in the war. Nicholas deduces she is deaf from her behavior, teaches himself sign language overnight from a library book, and the three become close friends.

Violet shares her own troubles: A mining company contracted to drill on her family's property abandoned operations after a cave-in, leaving their expensive drill trapped underground and refusing to pay the family what they owed. Her dream of attending art school was destroyed. The three friends agree to split any treasure they find, and night after night Nicholas recites diary passages from memory while they search for clues.

Nicholas finds hidden newspaper clippings inside a book on the library's highest shelf, a shelf the height-fearing Mrs. Rothschild would never have climbed. The clippings reference mysterious business meetings the Rothschilds attended in Stonetown during the period Diana received her inheritance. Nicholas demonstrates his eidetic memory, a near-photographic ability to recall text, by quoting books word for word and convinces Mr. Collum to let him travel to Stonetown to research the Rothschilds. At the Stonetown Library, however, Nicholas discovers the building did not exist during the critical year, making the relevant newspapers unavailable.

Returning to the Manor, Nicholas learns that Mr. Collum deliberately sent him away so that John could be adopted without Nicholas present. The Spiders steal and burn John's farewell letter. Devastated and publicly humiliated after collapsing in tears before the entire orphanage, Nicholas runs away in the middle of the night, walking to Pebbleton and hopping a train. On the train, a kind government attorney named Mr. Harinton discovers him, buys him breakfast, and promises to help. For the first time, Nicholas encounters a genuinely selfless adult willing to make sacrifices for a stranger.

Inspired by Mr. Harinton's example, Nicholas undergoes a transformation. He realizes he has been focused exclusively on his own escape rather than helping others and decides to return to Rothschild's End. Before going back, he spends an entire night dismantling the mining drill from the collapsed tunnel on the Hopefield property, crawling on his belly through the narrow passage to carry out the parts piece by piece, then reassembling the drill outside. He presents the recovered drill to Violet along with legal contacts from Mr. Harinton to force the mining company to honor its contract.

Nicholas chisels into the observatory walls, confirming there is no hidden treasure chamber. Walking back to the Manor at dawn, he has an epiphany triggered by a plaque at the Stonetown Library. The plaque credits the library's construction to the "Alexandria Foundation," and Nicholas realizes "Alexandria" is an anagram of "Diana Rexal," Mrs. Rothschild's maiden name. The "treasure" was always the Manor's library of beautifully re-covered books, and the missing millions were anonymously donated to build the Stonetown Library.

Nicholas presents Mr. Collum with conditions before revealing the truth: cooperative farming with the Hopefields, selling surplus eggs in Pebbleton, relocating the girls' dormitory to the more comfortable schoolhouse, and allowing Nicholas to repair broken equipment for resale. Mr. Collum agrees, and Nicholas leads him to the library to explain that the books are the treasure and there is no hidden fortune.

Nicholas learns that the Hopefield family has adopted John. Violet arranged the adoption by telling her parents about the boys, and John now lives on the neighboring farm as her brother. In a final confrontation, Nicholas lures the Spiders into a trap, locks them in a room with younger children as witnesses, and forces them to promise to stop bullying everyone. He even offers to help them with their schoolwork. Reunited with John and Violet at Giant's Head, Nicholas shares blackberry pie under the stars. He resolves to stay at Rothschild's End rather than let Violet sacrifice art school so her family can adopt him. Alone in his room, he traces rectangles on his plaid blanket, imagining each one as a door of possibility, eager not to rest but to begin.