Inthispowerfuldocumentary,MamaYang,an84yearoldwomanlivinginNewYork,findsherselfincorrespondencewith45highsecurityprisoninmatessheviewsasherownchildrenMostareChineseAmericanimmigrants,andseeinMamaYangamotherfiguretheyneverknewbeforetheysteppedthroughprisonwalls                  
                　　ForMamaYangthough,thestoryisaboutmorethanChristiancharityShehadalreadylivedafulllifeinTaiwanwhenherhusbanddiedatagesixtyandhersonlosttheirhouseinafinancialblunderShemovedtotheUStostartanewandliveswithaTaiwaneseAmericangranddaughterthatremainsdistantInafilmmarkedbyfamilyseparations,MamaYangwritesletters–whethertotheincarceratedortoherowngranddaughter–toheallifetimesofwounds