座落在星光部落星光國小旁的雜貨店「免姨商店」，是星光國小的小朋友放學後的天堂。獨自經營雜貨店的老闆兼店員阿免姨（林美秀飾），熱心照料著每個肚子餓的小朋友。阿免姨的茶葉蛋，就像溫暖人心的暖暖包。老郵差米多力（陳慕義飾）把整座山當成自己的管區，天天尋找賺取外快的機會，希望有朝一日能存到旅行基金，帶著阿免姨去各地旅行。他和悶悶不樂的小孩Yabi（韋杰飾），都把商店當作自己的家，整天與阿免姨為伴。 有天，一位美國籍神父吉米（紀亞文飾）來到星光部落，免姨商店因此關起了大門，只因阿免姨想跟神父學ABC.....

Set in the village of a mountain town, a grocery store owner surprises everyone when she decides to learn English from a young missionary who has just arrived. Through her studies, she slowly begins to reveal secrets that she has kept hidden for over 30 years...