In Alaska, Marty tries to capitalize on his recent string of good luck by building a second cabin at the far end of his trap line. Andy flies in to help but with temperatures dropping below zero, the backbreaking labor takes a toll. Tom is still recovering from a knee injury, but he needs a beaver tail to finish his latest commission. Tim and Nancy volunteer to head to the river and check Tom's traps for him, but it proves to be more challenging than they expected. In the Ruby Valley... with his prized stud horse, Rusty, threatening to escape and join a wild herd, Rich works on fixing up his corral along with his friend, Brad. But things quickly start going south. In Idaho, George Michaud has a run in with a thieving predator and in North Carolina, Eustace, Preston and Scout continue to work on the damaged tool shed roof, giving Eustace a chance to test Scout's evolving skills.