生日快樂歌聲響起,女嬰呱呱墜地,四名女子在監獄慶祝新生兒降臨。惠貞、阿佩、阿蘭和玉英奶奶各自背負不堪過去,有緣相逢成為獄友同舟共濟,互相扶持比家人還要親密。新來的宥芯異常叛逆,與人衝突不斷難以親近,卻也在爭吵中建立起友誼。女嬰被診斷出眼疾,必須送養方能就醫,音痴的惠貞決定送女兒最後一份回憶,陽光女子合唱團就地成立。面對教官親友的存疑,還有外人的成見和瞧不起,她們該如何穿越重重非議,唱出自己的動人生命?
As the birthday song plays, a baby girl is born inside a women’s prison, welcomed by four inmates, each burdened by a painful past. When a rebellious newcomer arrives, clashes give way to friendship. After the baby is diagnosed with an eye disease, the inmates form a prison choir to gift the baby girl a final memory. Drawing from real-life stories, director Gavin Lin’s heartfelt drama blends humour, music, and redemption.