In Nazi Germany, nine-year-old Bruno moves to a new town (Auschwitz) and ventures out to explore his environment.
He encounters a boy wearing striped pajamas on the other side of a fence. He befriends him.
Bruno’s family hosted a dinner for Adolf Hitler and his companion Eva.
Bruno’s imprisoned friend Shmuel asks for Bruno’s help in finding his father. Bruno disguises himself as one of the prisoners and enters the death camp.
The two boys are tragically killed in the gas Chambers.
The novel, set in Nazi Germany, begins when nine-year-old Bruno and his family must move from their lovely home in Berlin to a new house in an unfamiliar place called "Out-With." Tempted to explore his new environment, Bruno is told that there are certain places that are "Out Of Bounds At All Times And No Exceptions." Unable to fight his adventuresome spirit, however, Bruno ventures forth into the unknown one afternoon.
Bruno comes upon a fence that he follows until he sees a young boy sitting on the other side of the fence. The shoeless boy is wearing striped pajamas and a cloth cap. Bruno also notices that the boy is wearing an armband with a star on it. Bruno makes fast friends with the boy, Shmuel, and they quickly discover that they share the same birthday. The boys discuss their families and where they are from. At the end of their first meeting, Bruno asks Shmuel why there are so many people on his side of the fence and what they are doing there. A few days later, Bruno's father has dinner guests; the man's name is "the Fury" and his date is called Eva. Bruno instantly dislikes the couple. Bruno's sister Gretel, whom he refers to as "the Hopeless Case," is smitten by the man and tries hard to impress him and his lady friend. Bruno, however, is disgusted by his sister's behavior and her budding romance with a young soldier.
Much like Bruno hears "Auschwitz" as "Out-With," he also incorrectly hears "the Führer" as "the Fury." Boyne masterfully tells the story from Bruno's perspective; it is clear that the innocence of Bruno's childhood remains intact despite the fact that he is living on the periphery of a death camp and has met Adolf Hitler.
Bruno continues to explore the woods near his house and often finds himself at the fence spending time with Shmuel. Bruno brings him food, and the friends lament the fact that they cannot explore together or play a game of football. Shmuel confides in Bruno that he is unable to find his father and he is worried. Bruno vows to help Shmuel look for his father; to that end, Shmuel promises to get Bruno some pajamas so that he will blend in on his side of the fence.
One fateful day, Bruno sheds his clothes, dons the pajamas, and sneaks onto Shmuel's side of the fence. As the boys search for Shmuel's father, the soldiers herd the prisoners, Bruno among them, into the gas chambers where they meet their untimely death hand in hand.