The novel fictionalizes Albert Einstein as a young scientist who is troubled by dreams as he works on his theory of relativity in 1905. The book consists of 30 chapters, each exploring one dream about time that Einstein had during this period. The framework of the book consists of a prelude, three interludes, and an epilogue. Einstein's friend, Michele Besso, appears in these sections. Each dream involves a conception of time. Some scenarios may involve exaggerations of true phenomena related to relativity, and some may be entirely fantastical. The book demonstrates the relationship each human being has to time, and thus spiritually affirms Einstein's theory of relativity.
The novel is sometimes cited as the source of the urban legend apocryphal "universal force" letter from Einstein to his daughter, Lieserl, but the novel does not contain the letter.