Henrietta Leavitt, begins work at the Harvard Observatory in the early 1900's. She is not allowed to touch a telescope or express an original idea. Instead she joins a group of women "computers" charting the stars for a renowned astronomer who calculates projects in "girl hours" and has no time for women's probing theories. In her free time, Henrietta attempts to measure the light and distance of stars, but she must also take the measure of her life on Earth, trying to balance her dedication to science with family obligations and the possibility of love.
