In a lonely valley, deep in the mountains, a ranger watches over the last surviving grizzly bear.

With the natural world exhausted and in tatters, Ben has dedicated himself to protecting this single fragment of the wild.

One night, he hears voices in the valley - poachers, come to hunt his bear.

A heart-pounding chase begins, crossing forests and mountainsides, passing centuries of human ruins. Sometimes hunter, sometimes prey - Ben must choose the bear's fate and his own.

Is he willing to lay down his life for a dying breed?

Is he willing to kill for it?