In the town of Milwaukee, Kent Knapp and his three sons make their living in the 5,000-year-old craft of blacksmithing. Behind the power of his 100-year-old screw press and 135-year-old anvil, Kent built this business from the ground up. From bank vaults, to bike frames, and any large steel piece you can dream up, there’s nothing this family can’t forge. Kent has made it his mission to pass the trade down to his kids, hoping that they’ll step up and carry the business into the future. But they’re going to have to work hard for it and come together as a team, which for these adolescent brothers, skilled as they are, is an uphill battle.