Diane takes on a new client who is accused of cyber-terrorism, resulting in unforeseen repercussions for the firm, especially Lucca. An accident brings Diane and Kurt together. Henry reveals new truths about the scandal to Maia.

The FBI question Diane as part of a job background check on Kurt, leading to unexpected and serious consequences. The mayor of Chicago invites Adrian and Julius to join a 'think tank' tasked with figuring out how to spend funds that will address the "Kill All Lawyers" problem. Chaos ensues in the delivery room after Lucca goes into labor early.

A storm is brewing at Reddick, Boseman & Lockhart when revelations of past indiscretions involving a partner come to light. Right when she thought the world couldn't get any crazier, an incident at home pushes Diane to her breaking point. Meanwhile, Lucca is brought a new opportunity while Marissa teaches Maia to toughen up.

In the season five finale, it's too many courts and too little time for the folks at Reddick/Lockhart. Marissa is mounting a strong defense in Vinetta's court for Matteo, while Diane attempts to get an interview with him in order to spring Matteo from court. Carmen, Liz, and Allegra defend drug dealer, Oscar Rivi, as prosecutors attempt to put him back in prison.

While STR Laurie is investigated by the FBI, Liz and Ri'Chard attempt to take their clients. As they fight to extricate themselves from STR Laurie, Ri’chard and Liz must decide who is head of the firm. Meanwhile, Diane is forced to expose her PT-108 treatment.

The office must survive after being trapped by white supremacists.