Joanna faces questions about her family's departure while attempting to convince the locals that she has switched sides.

Relying on her esteemed reputation as a partner at CTS, Joanna convinces a hydrologist to come to Millwood to test the soil.

Joanna and Billy believe the steel mill and its owner are responsible for the barrels; Joanna questions everything her father told her.

The sick girls and their families must face the mill employees, who are worried about losing their jobs.

As personal threats escalate, Joanna hopes that a neuropsychologist can help prove that the girls were poisoned.