Fresh off her legal victory over billionaire CEO Arthur Frobisher, Patty is taking a break from the law and pouring her energies into her new charitable foundation. But when Patty receives a call from Daniel Purcell, a man from her past, she finds herself entangled in a case with personal and professional repercussions, the likes of which she could never have imagined.

Patty suspects there is more to Daniel Purcell's case than simple murder; Ellen secretly assists the FBI in their attempt to flip Tom Shayes and use him against Patty.

Patty begins to suspect Purcell of withholding vital information; Ellen uncovers a decades-old secret from Patty and Purcell's past.

Patty works to clear Daniel in his wife's murder; Ellen and Tom go to West Virginia to gather vital information in the case against Ultima National Resources.

Patty begins to question Ellen's motives for returning to the firm; Patty tries to stop a corporate merger that she thinks is connected to Christine Purcell's murder.

Convinced that she knows who is responsible for Christine's murder, Patty uses the media to wage war; Ellen gets closer in her attempt to link Frobisher to David's murder.

Ellen, furious at Patty's new alliance, provides the FBI with a new lead to bring her down.

As she copes with mounting pressure, Patty begins to unravel Walter Kendrick's energy scheme. Meanwhile, Arthur Frobisher's past will come back to haunt him.

As Patty increases the pressure in her case against UNR, the opposition starts to show its cracks; Wes and Ellen's relationship heads in a new direction; the FBI's investigation into Patty takes a shocking turn.

Claire risks everything to oust CEO Walter Kendrick; Ellen discovers a secret about Patty's personal life.

Ellen convinces the FBI to radically change their approach in the investigation. Meanwhile, Daniel Purcell reenters Patty's life and becomes critical to her case against UNR.

Patty goes to extremes to win her case against UNR, as Ellen's season long quest for revenge builds to an explosive conclusion.