While Beth relishes her career as a forensic botanist with the FBI, Warren is fed up with the endless round of meetings his management role requires. He wants to be hands-on with investigations, but that’s not something an executive assistant director with the FBI does.

Warren is tempted by a job offer from his best friend, but must reconsider when Beth is given a life-changing diagnosis which will impact their future.

A bank robbery gone wrong leaves an innocent man dead, sparking an FBI investigation. The thieves believe they are safe from discovery, but a crucial piece of evidence is left behind. Beth uses the evidence to narrow the search, leading to an arrest.

The robbery investigation takes a turn when the man they have in custody dies while awaiting trial.

Then a suspect in the case is killed by a bomb.

And then another.

Is a vigilante killer on the loose, or is a grieving family member seeking revenge?

And who is next on the list?