In Season 4, Harvey and Mike find themselves on opposite sides of a corporate takeover battle that draws attention from the government.
Mike and Harvey adjust to their new paradigm. As they butt heads over strategy in Mike’s first foray into investment banking, their new attorney-client relationship may be short-lived. Meanwhile, Pearson Specter discovers that a disgraced former District Attorney may be pursuing a vendetta against Harvey and the firm.
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 and Rachel work closely with one another while Jessica and Harvey try to outmaneuver Sean Cahill. Meanwhile, Louis tries to hide evidence for the sake of his career.
Sean begins a round of depositions for the SEC investigation, endangering the employees at Pearson Specter.
Harvey and Jessica take measures to protect the firm; Louis tries to get his affairs in order.
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.
Mike takes on a humanitarian case that could potentially harm firm business.
Evan Smiths offers new evidence that nullifies the firm's victory against Liberty Rail. Harvey and Mike scramble to save the Liberty Rail case; D.A. Wolf comes after the firm; and Jessica and Malone try to adjust to their new circumstances.
Cahill needs help from Harvey in order to make his case against Woodall and Forstman; Rachel and Mike deal with their different relationships with Harvey; and Donna helps Louis with a crisis.