关于几个海狸家庭在野外生活的故事。建造水坝的有趣过程，以及饥饿的熊和其他对新建房屋的影响所带来的危险，都可以被观察到。

A story about several beaver families in their wild surroundings. The interesting process of building a dam can be watched as well as the dangers arising from hungry bears and other influences on the new-built home.