卡尼尔和弗拉茨是美国一所小学的老师,她们和南非某贫困小镇的一所小学建立了友谊帮带关系。有一次,她们带着几个美国学生来到了那所南非的学校,决定带领南非的孩子们去山上探索自然奥秘。当走到半山腰时,意外发生了:弗拉茨因为想拉住一个南非黑人少年,结果自己失去了平衡,跌入一条山沟里,顿时血流不止。医生发现弗拉茨失血过多需要输血,遗憾的是她的血型并不多见,卡尼尔和那些美国学生没有一个和她的血型相匹配。这时,卡尼尔注意到了那个始终默默站在一边的 Garnier and Fratz are elementary school teachers in the United States who have established a friendship with a primary school in a poor South African town. On one occasion, they came to the South African school with a few American students and decided to lead South African children to the mountains to explore the natural mysteries. When it came to the hillside, the accident took place: Fratz wanted to pull a South African black boy, the result of their own loss of balance, fell into a ravine, suddenly more than the current. Doctors found that bleeding too much need for transfusions, unfortunately her blood type is rare, and none of Garnier and those American students to match her blood type. At this moment, Garnier noticed the one who stood silently