As Alicia races against Louis Canning to round up the most clients for an Erin Brockovich-style class action lawsuit, a mole is detected in the law firm who seems to be working for Canning. Meanwhile, Diane and Will must put their coup on hold as Derrick brings in a Super PAC as a client.

Diane represents her on-again, off-again love interest, ballistics expert Kurt McVeigh, when he is sued for testimony he gave in the murder trial of an accused cop killer who was recently exonerated. Meanwhile, Eli has a personal interest in Natalie Flores, Wendy Scott-Carr's illegal nanny.