Mike and Harvey adjust to the new arrangement, butting heads over strategy; the firm learns that a disgraced former DA may be pursuing a vendetta.
Harvey and Mike find themselves on opposite sides of a takeover battle that threatens to turn into a knockdown, drag-out fight - a fight complicated by Rachel's relationship with Mike. Meanwhile, Louis finds himself partnered with recent SEC defector Jeff Malone in defending Pearson Specter from disgraced DA Eric Woodall.
Pearson Specter's client, Logan Sanders, pushes Harvey to prove his relationship with Mike won't hinder him from doing what it takes to win their takeover battle. Meanwhile, Louis attempts to mend his relationship with new colleague Jeff Malone, but their ensuing bonding leads to some misunderstandings.
Having lost his partner on the inside, Mike moves to a hostile takeover of Gillis Industries. On the other side, Harvey and Louis pull out all the stops to make sure they win this takeover fight, and things take a personal turn. Meanwhile, Jessica and Malone come face-to-face with Sean Cahill, the attack dog with the weight of the SEC behind him, bent on bringing The Firm down.
Rachel becomes increasingly anxious about work, school, and the growing attraction between herself and Pearson Specter client Logan Sanders. Meanwhile, Louis helps Donna prepare for a major role while she encourages him to face his fear. Harvey and Mike agree to a ceasefire, but Sam accuses him of collusion and Mike learns how ruthless his new partner can be.
When Sean Cahill brings Pearson Specter client Logan Sanders in to the SEC for questioning, Harvey tries to put an end to the Gillis Industries takeover. But when Mike continues to play hardball, Louis sees an opportunity to make a name for himself by saving the day. Meanwhile, Rachel must contend with the fallout of a moment of weakness.
Rachel brings disturbing news while Mike is still reeling from the aftermath of the battle for Gillis Industries. Feeling Harvey is his only friend left, Mike makes a rash decision. Meanwhile, Jessica asks Louis to pick his own reward after his victory for the firm.
Mike has returned to Pearson Specter, but barely has time to savor it - he's back to working shoulder-to-shoulder with Rachel, in the wake of her confession about Logan. Jessica and Harvey try to outmaneuver the relentless Sean Cahill, as he goes after the firm's files on the Gillis Industries takeover. And Louis struggles to hide the illicit deal he made to win that fight; evidence of which will bury the firm.
The SEC investigation comes to a head as Sean Cahill begins a round of depositions - no one at Person Specter is safe, and no topic is off limits, as the inquisition unearths secrets both professional and personal.
It is up to Jessica and Harvey to protect the firm from competition. Louis has to try and find a balance between personal and professional affairs.
Louis is gaining leverage in his quest to become a name partner of the firm and the Pearson Specter team is dealing with the fallout of Louis learning Mike's secret.
Harvard ethics professor Henry Gerard seeks Harvey's help with a case that requires a lack of ethics to win. Mike, meanwhile, does his best to not be spotted by the professor, whose class he never took; and Louis tries to wine and dine a socialite CEO.
Harvey and Louis take a drive to aid an out-of-town client to whom they both have deep ties; and Harvey uses the opportunity to force a confrontation between Louis and Mike about their trust issues. Meanwhile, in a flashback, we discover the root of Harvey and Louis's competitive relationship in their early days at the firm. And Mike first learns the limitations of his genius when it comes to the law.
When Mike takes a humanitarian case with the potential to jeopardize firm business, Harvey must decide how much to rein in his associate. Meanwhile, Jessica wrestles with the distance she's been forced to put between herself and Jeff Malone. And Louis fights to get the respect a name partner deserves.
When Evan Smith brings new evidence nullifying the firm's victory against Liberty Rail, Harvey and Mike must scramble to save the case. But when D.A. Wolf comes after the firm, they're faced with the real possibility of Donna going to prison for her role. Meanwhile, Jessica and Malone try to adjust to their new roles in each other's lives.
When SEC investigator Sean Cahill fails to link his corrupt boss Eric Woodall and corporate raider Charles Forstman, Harvey must revisit his own uncomfortable past in order to find a way to put them away for good. Mike and Rachel confront the fact that, while Rachel is Harvey's associate, Mike is his guy. And Donna helps Louis with an unexpected crisis.