A mysterious illness affecting high school girls in her home town brings lawyer Joanna Hanley back to the place she left 17 years ago.

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.

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.

Billy and Joanna make the horrific discovery of a huge dump site on a school field and nearby farmland. They finally have enough evidence to certify as a class but this fight won't be easy.

Joanna Hanley and her colleague get some help from a surprising source.