Everyday is a fight for their freedom and independence, but some battles are harder fought and push the men closer to the edge than ever before. These are Mountain Men's closest calls. While chasing mountain lions, Rich Lewis comes face to face with a cougar 50-feet off the ground. His dogs take him deep into a dangerous cave and force him into a fight for survival against the elements. Marty Meierotto almost takes a nosedive to his death in his bush plane. He's left stranded at night with no survival gear and he faces a desperate struggle to hunt down enough meat to make it through the winter. In the Yaak, Tom Oar fights back deadly wildfires and grizzly bears to save his only asset in life–his home. Eustace Conway risks it all to chase armed poachers off his land. And finally, in Maine, a high-speed snowmobile crash almost takes Charlie Tucker out for the season.