When it's suspected that her big-pharma client's vaccine has caused a mysterious illness affecting a handful of teenaged girls, high-powered attorney Joanna Hanley returns to her hometown to quickly and quietly settle the case.

A fish out of water in a town that's as foreign as it is familiar, Joanna battles with questions over her family's hasty departure when she was a teenager and attempts to convince the locals that she has in fact switched sides.

Joanna uses her esteem as partner at CTS to convince a hydrologist to test Millwood's soil. With reluctant permission from the mayor, Joanna and Billy narrow their list of suspects to a handful of industrial sites in the community.

Joanna and Billy are convinced that the local steel mill and its owner Ben Matheson are responsible for the barrels. A shocking revelation in Joanna's personal life leads her to question everything her father had told her.

Anger over the claim against the mill pits the sick girls and their families against employees of the mill who worry that their jobs are on the line. When the local Pastor's daughter becomes afflicted with the illness, he blames the girls themselves. Parents begin keeping their healthy kids home from school, so to quell the mounting hysteria, the High School Principal cracks down on the affected girls and prevents them from attending their prom. Joanna fires back at the school, but victory eludes her. When the kids decide to throw a prom of their own, Billy and Joanna are made honorary prom king and queen. However, the moment is over-shadowed by the mill's answer to her claim - they've hired her father's law firm to represent them and they plan to annihilate her.

As threats against Joanna and Billy escalate, Joanna digs her heels in on the case. Relying on the expert testimony of a respected neuropsychologist, Joanna expects he'll prove once and for all that the girls have been poisoned.

Stuck in Millwood without a case and no firm to return to, Joanna is at loose ends on what to do next until a whistleblower comes forward.

New leads bring Joanna and Billy to make the horrific discovery of a massive dumpsite on farmland near the school. Joanna's father takes over as leas counsel and it becomes clear that they're running out of time.

With Joanna disqualified and the clock running out on Billy who'll have to face Joanna's father alone, Joanna must think outside the box if they want to win this. She must face the one person who may be able to help her defeat her father, her mom. Not only does she learn the truth about her father, she gains the critical piece of evidence that ties the mill and their parent company to the dumping. Regrettably, Joanna returns too late and finds the case in shambles, her named plaintiff removed and the class de-certified.

Using the law to her advantage, Joanna herself reinstated on a technicality and plays her trump card. When it isn't enough to elicit a settlement offer, Joanna makes things personal. She blackmails her father with incriminating evidence and threatens to expose him if he refuses to negotiate. Once she strong-arms him into a settlement, she must choose whether to expose his dirty little secret or not, but doing so may cost her more than she's prepared to pay.