When Ellie is called to Chicago to help with a new case, Carter follows and together they attempt to track down a suspect in a train crash.

Ellie Molaro is an investigator with the NTSB - the US federal body which determines the causes of major accidents. She becomes suspicious of the "official answers" to an oil rig disaster, spearheads a private investigation with a secret tipster named Carter. Carter claims that a conspiracy of "Fixers" are behind some of the worst global disasters, all rigged to manipulate the stock market, and reap billions for a select few. Now, their largest operation in decades is an impending, catastrophic event targeting Washington, D.C. and the only way they can succeed is if Ellie and Carter are among the casualties.