south korea. 25 miles outside seoul. a fire breaks out at a liquefied petroleum filling station in 1998. on site are hundreds of tanks that could explode, and a tanker truck ready to blow sky-high. thousands are evacuated from the densely packed city neighborhood as firefighters use water to try to cool down the canisters and keep them from rupturing. tv news crews on the ground and in the air record the chaotic scene as the fire grows bigger, but what the camera can't see is massive underground storage tanks filled with tons of the highly flammable liquid gas that is used to fuel cars. the inferno rages out of control. there's nothing firefighters can do. the tanks keep catching fire. finally, the flames reach the underground tanks, and they ignite.