Reeling from newly uncovered family secrets, and anger at her mother and aunt for keeping them from her, Joy runs away to Shanghai in early 1957 to find her birth father, the artist Z.G. Li, with whom both May and Pearl were once in love. Dazzled by him, and blinded by idealism and defiance, Joy throws herself into the New Society of Red China, heedless of the dangers in the communist regime.

In nineteenth century China, in a remote Hunan county, a girl named Lily, at the tender age of seven, is paired with a laotong, or "old same," in an emotional match that will last a lifetime. The two women exchange messages written on silk fans and handkerchieves using nu shu, a unique language that women created in order to communicate in secret, sharing their experiences, but when a misunderstanding arises, their friendship threatens to tear apart....

When the body of an American archaeologist is found in the Yangzi River, Ministry of Public Security agent Liu Hulan and her husband are sent to investigate, and they soon begin to suspect the death was not accidental.