这部历时数年、跨越三大洲拍摄的六集纪录片，追踪六只濒危幼崽在人类世界成长却终将回归自然的历程。从初生襁褓到踏上荒野征程，聚焦这些生命在生存挑战中展现的坚韧与胜利，既刻画动物自身的生存之道，也展现守护它们的非凡人类。

The story follows Lewis as he meets an American fan, Joy Gresham, whom he befriends and eventually marries. The story also deals with his struggle with personal pain and grief: Lewis preaches that one should endure suffering with patience, but finds that the simple answers he had preached no longer apply when Joy becomes afflicted with cancer and eventually dies.