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Jonathan Safran Foer is one of the most extraordinary authors of our time, the recipient of numerous literary awards, including the Guardian's Best First Book Award and the National Book Award for Jewish Studies, the Young Lions Award from the New York Public Library, and more. The film adaptations of his works have thousands of fans in different countries, and the film based on the novel "All is Clear" has gained great success with audiences around the world.

Oscar is 9 years old. On 11 September 2001, his father was killed in a terrorist attack. Since that day Oscar hardly sleeps, he suffers from panic attacks. He feels as if depression is shackling his legs with heavy boots. His mother has also started dating a man named Ron, and Oscar's luck has run out. Until one day, the boy finds a key in his father's wardrobe. What does it unlock? The only clue is the name Black written on the key holder. Now Oscar has a goal. He wants to contact everyone in New York named Black. He will learn the stories of their pain and joy, meet a woman from the Empire State Building, and Oscar's mysterious neighbour will reveal a secret he has been hiding from him all his life. Oscar does not yet know where his search will lead him. And what is hidden under the lock that is unlocked by his father's key: immeasurable grief or dreamed-of happiness?