In nineteenth-century China, in a remote Hunan county, a girl named Lily, at the tender age of seven, is paired with a laotong, an “old same,” in an emotional match that will last a lifetime. The laotong, Snow Flower, introduces herself by sending Lily a silk fan on which she’s written a poem in nu shu, a unique language that Chinese women created in order to communicate in secret, away from the influence of men. As the years pass, Lily and Snow Flower send messages on the fan and compose stories on handkerchiefs, reaching out of isolation to share their hopes, dreams, and accomplishments. Together they endure the agony of footbinding and reflect upon their arranged marriages, their loneliness, and the joys and tragedies of motherhood. The two find solace in their friendship, developing a bond that keeps their spirits alive. But when a misunderstanding arises, their relationship suddenly threatens to tear apart.