Meet four former Marines who believe that they have what it takes to survive any doomsday scenario. Joel, Mark, Mike and Jimmy own Forge Survival Supply; their mission, use what they have on hand to teach and test their clients' skills. In a remote area of Colorado, Mike and Mark meet a couple who are serious preppers. They want to step up their game, but the guys worry their open land and young children could interfere. The Marines will put them to the ultimate test with a simulation attack.