The Bakken shale boom in North Dakota produces more crude oil than pipelines can carry, so railroads pick up the slack, hauling mile-long trains of tank cars through towns that never expected to host a fuel depot. The film traces how that shift happened fast and mostly without new safety rules, then turns to what happens when it goes wrong. The 2013 Lac-Megantic disaster in Quebec, where a runaway train exploded and killed 47 people, anchors the story as the clearest warning sign regulators had. Interviews with rail workers, safety officials, and residents living beside the tracks lay out the design flaws in the older DOT-111 tank cars still hauling crude, and the industry pressure that kept them in service. Archival news footage of derailments and fireballs makes the risk concrete rather than abstract. The film's real subject is the gap between how fast an energy boom can move and how slowly the safety system meant to contain it actually responds.