"Snow Flower" is a novel by Lisa See that explores the deep friendship between two women, Lily and Snow Flower, in 19th-century China. The story is set in the Hunan province and delves into the practice of nu shu, a secret writing system used by women to communicate. The narrative highlights the challenges faced by women in a patriarchal society, including foot binding and arranged marriages. As their lives unfold, the bond between Lily and Snow Flower is tested by societal expectations and personal struggles, ultimately revealing the complexities of friendship and loyalty.