On a sultry August night in Arkansas during 1987, two high school seniors were brutally murdered, their bodies strewn across train tracks to be dismembered by a speeding train. The murders have come to be known as the train deaths. Upon further investigation, the evidence of this crime leads to the heart of a massive C.I.A. drug and weapons smuggling operation based in Mena, Arkansas, and raises stunning questions about the C.I.A. and U. S. government involvement in drug and weapons trafficking worldwide.