The main character of the book is a young scientist named Jan, who becomes the leader of the group and leads them through the challenges they face in a new country. The plot of the book 'Польские хроники' revolves around the story of a group of Polish scientists who were forced to flee their homeland during World War II and continue their work in the United States. The main character of the book is a young scientist named Jan, who becomes the leader of the group and leads them through the challenges they face in a new country. At the beginning of the book, Jan and his colleagues are living in Poland, working on various scientific projects, including the development of a new type of radar technology. However, as the war breaks out, they are forced to flee to the United States to escape the violence and persecution of the Nazi regime. They settle in New York City and begin working at Columbia University, where they continue their research and development of radar technology.

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