内容简介：
A train loaded with toxic chemicals derails in Wilburn, causing a toxic release and explosion that kills hundreds of mostly black residents. Juliana Del Rio, EPA, and Sean Ryan, FBI, team up again to investigate allegations of racial environmental profiling. They infiltrate hate groups in a southern town and follow suspects to an international environmental conference in Buenos Aires, Argentina, to find out who and what is causing a series of world-wide suspicious chemical accidents.