Swiss-Canadian bear researcher Reno Sommerhalder has been returning to the remoteness of Alaska on and off for 35 years. The primeval forest of the Tongass is the land of bears, salmon and whales. This summer, Reno wants to get close up to the wilderness and tries to live only on what nature provides – just like the bears. In the course of his forays, he realises that the Tongass has changed: The glaciers are melting here too, the vital salmon runs have become irregular, the bears rarer and the herring have disappeared altogether.