Born into a family of household servants, Zhou Fanxing is chosen as a maid for a noble girl and discovers a gift for mathematics and astronomy that no woman of her station is meant to possess.
While her beautiful younger sister Mingyue climbs into the imperial harem and their mistress struggles with betrayal, Fanxing works in secret, knowing her discoveries can never bear her name.
Released from the palace into an ordinary merchant marriage, she keeps calculating the heavens as illness shortens her life.
At last, beneath a meteor shower she predicted decades in advance, the nameless servant finds the answer she has spent her life pursuing.
Three women—and the husband who loved her quietly—reveal what the stars meant to a genius the world refused to see.
