Oh my God Harvey. You poor dear! And poor Donna! Seriously I'm so upset. But also so excited about this season! This episode was honestly really hard to watch, but at the same time when it ended I had the biggest grin on my face. Let's go over the plot.
Basically, Donna has left Harvey and is going to start working for Louis. Donna tries to be an adult about it, but Harvey insists that they rip off the band-aid and just get it over with. Donna doesn't stay with Harvey for her final two weeks, therefore, and instead goes straight to working with Louis. Harvey is in denial. He thinks that Donna will come back. Louis is also uncertain about Donna's new position, as he thinks that Donna will abandon him and run back to Harvey. Harvey goes to see a therapist, hoping to be given anti-anxiety medication. He has been suffering from panic attacks due to losing Donna. He fears that he's going to drop the ball and mess things up.
Meanwhile, Rachel and Mike decide to keep their engagement a secret for the time being. Originally, they were going to tell Donna, but the news about Donna now working for Louis eclipses all else from their minds. Rachel misses a test in school because she sticks around and helps Harvey. Harvey is still refusing to hire a new secretary, thinking that Donna will come back. The case that Harvey and Mike are working on nearly gets screwed up because of a minor oversight of Rachel's, but Mike tells him it's his own fault for not hiring a new secretary. Rachel shouldn't be blamed, since this isn't even her job!