The merger complete, Jessica's new partnership with Darby is tested when he assigns Harvey a high-profile client, an oil baroness named Ava Hessington, who has a deeper past with Darby than originally thought. Mike works to reconcile with Harvey, while also trying to manage the fallout from his revelation to Rachel. Meanwhile, Louis convinces Darby to give him quartermaster responsibilities at the firm over his rival, Nigel, but the move backfires when Nigel is put in charge of something even more precious to Louis.
Louis offers Mike a case and partnership that could change his future at the firm. Harvey and Jessica team up to keep Ava Hessington out of jail, but their case is complicated by an old nemesis of Harvey's, disgraced former DA Cameron Dennis.
Cameron Dennis strikes back at Harvey by arresting one of his clients for hug. Katrina Bennett tries to win over Louis, who's still smarting from his rejection by Mike; and a British version of Harvey arrives to stir things up at the firm.
Harvey's defense of Ava hits a roadblock when the interests of her hug trial are at odds with Louis' work to thwart a hostile takeover of Hessington Oil by a rival businessman.
Lines between the personal and the professional get blurred when Harvey and Stephen work together on Ava's case, and Mike invites Rachel to join him on a case that gets complicated when his secret falls in the line of fire - with Rachel's parents.
Cameron's continuing use of shady tactics on Ava's case brings up memories of why Harvey left the DA's office to work for Jessica. As Rachel visits law schools, Mike looks back on what cost him his one chance at a degree.
Harvey clashes with Stephen over Ava's case, among other issues. Meanwhile, things are still tense between Harvey and Jessica as they strategize how best to defend Ava. And Louis enlists Rachel in his battle with Nigel over a broken contract? and heart.
As Ava Hessington's hug trial begins, Harvey, Mike and Jessica fight off betrayal from both inside the firm and out. Meanwhile, Louis and Donna seek to even the score with those who have done them wrong.
Pearson Darby Specter's "divorce" brings trust issues to the forefront. Harvey finds himself battling Scottie once again, Louis convinces Jessica to let him handle the dissolution talks, and Mike asks Rachel to take a big step forward in their relationship.
An old nemesis returns to complicate the Pearson Darby negotiations and put Harvey and Scottie on opposite sides once again. Meanwhile, recruiting a new hire puts Louis in Sheila's crosshairs, and Mike and Rachel find themselves in Jessica's crosshairs.
Things get complicated when Harvey mixes business with pleasure and gets caught between Jessica and Scottie. Painful memories plague Mike as he uses a case to exorcise demons against an old foe, while Louis' suspicions threaten to expose Mike.
Both Mike and Jessica lean on Harvey for support when things from their respective pasts throw them off their game.
Harvey goes one-on-one against an old law school rival, with an assist from Mike, while he and Jessica try not to get caught in the crossfire of a battle that erupts between Louis and Scottie.
While Harvey and Mike have unpleasant work to do for one of their biggest clients, Louis faces a huge challenge and Rachel tries to collect on an old debt.
Harvey faces off with a relentless attorney who goes after one of his biggest clients, Mike has to make a big decision, and former name partner Charles Van Dyke has an ax to grind.
Things are anything but business as usual when Harvey and Mike find themselves at odds with a tenacious U.S. Attorney. Scottie and Harvey can't seem to get on the same page and Mike and Rachel clash over plans for the future.