The Big Build's host, Nick Mystrom, lands in Northern Idaho to erect a 2-story medieval castle tower. Nick and CastleMagic builder Roger DeClements have two weeks to turn the earth's materials of stone, wood, and a bit of modern reinforcements such as steel to build a 24 foot tower (weather permitting). Will Nick be able to relax and gaze upon the stars from atop the tower before "reveal" day? Will Northern Idaho's weather cooperate? And will Nick finally be able to present the tower on reveal day?