In February 2013, a sinkhole opens beneath a house in Seffner, Florida, and swallows Jeff Bush as he sleeps in his bedroom. Rescuers work through the night trying to reach him, but the ground keeps collapsing, and his body is never recovered. The film uses that case as its anchor and interviews geologists and engineers who explain how Florida's limestone bedrock dissolves slowly underground until a roof of soil gives way without warning, sometimes opening a hole reported at around 100 feet deep. Footage of collapsed streets, swallowed cars, and evacuated neighborhoods shows how often this happens beyond the Bush case, and animations break down the water erosion process that hollows out the rock over decades before anyone on the surface notices anything wrong. Affected residents describe what it is like to lose a home, or a neighbor, to ground that gave no visible sign of failing. The film treats sinkholes less as freak accidents than as a predictable hazard of living on porous limestone, one that engineering can anticipate but rarely stop in time.