During a fierce Wyoming blizzard, Wade Kelly and his loyal dog Wrigley search the mountains for a missing sheep named Sadie. The whiteout separates Wrigley from the others. Two playful ferrets, Pip and Pax, join the rescue, helping Wrigley track clues to locate Sadie. Wrigley discovers Sadie beside a fallen log and guides her three friends back toward the ranch as the storm roars. But when Wade and Jesse return home, Wrigley and Sadie are still missing. Will Wrigley find her way home before the blizzard swallows the mountain?