To Share One Moon is a poignant, realistic and complex story of similarities and contrasts between cultures and countries as well as between reality and legend. Nui Nui (Mandarin for little girl) narrates the difficulties endured by the family as they adapt to a new culture and lifestyle in Canada. It is also a story of family breakdown, separation and loss. The legend of the Moon Lady, Chang-Er, and also the thoughts of an ancient Chinese poet parallel the family's story.