A takeover battle pits Harvey and Mike against one another, and the situation is only complicated further by Mike's relationship with Rachel. Elsewhere, Louis partners with recent SEC defector Jeff Malonein.
Logan Sanders, a client of Pearson Specter, looks to Harvey to confirm that his relationship with Mike won't prevent them from winning the takeover battle. Elsewhere, misunderstandings arise between Louis and his new colleague Jeff Malone.
Mike initiates a hostile takeover of Gillis Industries while Harvey and Louis work feverishly against his efforts. Elsewhere, Jessica and Malone meet with Sean Cahill, who has the weight of the SEC behind him in bringing down the firm.
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.
Harvey tries to end the takeover when Sean Cahill brings Pearson Specter client Logan Sanders to the SEC for questioning. Elsewhere, Louis finds a way to make a name for himself when Mike insists on playing hardball.
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; elsewhere, Jessica asks Louis to pick his own reward after his victory for the firm.
Gabriel Macht directs the Season 4 mid-season premiere, which finds Louis gaining leverage in his quest to become a name partner of the firm; and the Pearson Specter team 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 travel to see a client to whom they have deep ties; and Harvey takes advantage of the time to force Louis and Mike to confront their trust issues. In other events, in a flashback, the root of Harvey and Louis's competitive relationship is explained; and Mike learns the limits of his intelligence when it comes to the law.
Mike takes on a humanitarian case that could jeopardize firm business; Jessica wrestles with maintaining distance between herself and Jeff Malone; and Louis fights for the respect a name partner deserves.
In the Season 4 finale, 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.