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Brothers Chris and Casey Keefer have been dropped once again deep into the Arctic Circle and in the shadows of the Brooks Range on a familiar river with 110 miles between them and their extraction point.

As the journey gets underway, Chris and Casey weigh their options when the usually abundant caribou herd is nowhere to be found.

Chris and Casey have made a decision to pack the raft and head downriver to explore new ground in an effort to locate the caribou herd and put their eyes on a mature bull moose.

As the brothers settle in at Camp 2, Chris and Casey have some decisions to make when the mountains begin to come alive with bull moose...and several giant grizzlies.

With two more bull moose located at high elevation, the calling of the river becomes loud as Chris and Casey weight their options at Camp 2.

With the clock ticking, bull moose at the high elevations and the caribou herd still nowhere to be found, the brothers are faced with a tough decision and 90 miles still in front of them to extraction.

With 30 miles still between the brothers and good moose country, Chris and Casey awake with new energy...and the unforgiving rock garden between them and their next camp.

At Camp 3, the brothers split up to better their odds and in the process find hundreds of caribou tracks and moose sign on the gravel bars from days earlier while Chris goes deeper in hopes to call in a rutting bull.

With only 72 hours remaining until extraction, the bothers are forced to leave Camp 3 and tackle the final 45 miles of river, hoping for a chance at a bull of any kind along the way.

With 24 hours remaining and 20 miles to the extraction point, a massive blizzard moves into the Brooks Range forcing Chris and Casey to make some tough decisions in order to make it out of the Brooks Range safely.