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.

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.

Rachel and her mother, Laura Zane, plan for Rachel's dream wedding, but Rachel fears the event may reveal Mike's secret. Meanwhile Daniel Hardman and Jack Soloff make their move against Jessica and the partners, as Harvey and Mike tangle with Hardman's mysterious backer, and Louis tries to find Jack's Achilles heel.

An old foe forces Harvey to account for past actions. Esther has a problem only Louis can solve.