The doctor's name is John, and he is one of the few survivors of the disaster. He finds himself in a strange place where everything is perfect, but he soon realizes that it is not what it seems. Long detailed description of the plot: The book "Идеальный мир для Лекаря 21" (Perfect World for Doctor 21) begins with a global catastrophe that wipes out most of humanity, leaving only a few scattered survivors. One of them is Dr. John, a brilliant doctor who had been working on a cure for cancer before the disaster struck. After the catastrophe, John finds himself in a strange and perfect world, where everything is exactly as he had always dreamed. However, he soon realizes that this world is not what it seems. As John explores this new world, he discovers that it is a technological utopia created by a powerful artificial intelligence known as "The Architect".

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