居住在同一个山谷里的一对老年兄弟K和W,因为未说明的原因四十年不曾说过一句话,全靠一条狗传递纸条来交流沟通. 整个山谷并没有多少人居住,但就在全山谷举行的养羊比赛中,K的大公羊以微弱优势获得胜利,W十分不服气,不经意间,他发现K的羊得了瘟疫,于是前去举报,导致包括K和W 家在内的整个山谷的羊都不得不面临被人道主义毁灭的危险.没有了羊,K完全不知道怎么度过漫长的冬季,而受到牵连的W在地窖里悄悄地藏了几只,但这个秘密并没有保守太久......In a secluded valley in Iceland, Gummi and Kiddi live side by side, tending to their sheep. Their ancestral sheep-stock is considered one of the country's best and the two brothers are repeatedly awarded for their prized rams who carry an ancient lineage. Although they share the land and a way of life, Gummi and Kiddi have not spoken to each other in four decades. When a lethal disease suddenly infects Kiddi's sheep, the entire valley comes under threat. The authorities decide to cull all the animals in the area to contain the outbreak. This is a near death sentence for the farmers, whose sheep are their main source of income, and many abandon their land. But Gummi and Kiddi don't give up so easily - and each brother tries to stave off the disaster in his own fashion: Kiddi by using his rifle and Gummi by using his wits. As the authorities close in the brothers will need to come together to save the special breed passed down for generations, and themselves, from extinction.