Chuck is having cataract surgery and, for the first time ever, must miss a day of work. Carol, eager to shirk her overwhelming intern duties, offers to take care of him. Meanwhile, Katie is excited for a peaceful day but with Chuck gone, Greg is reluctant to be the bad guy. As a result, "The Breakdown" descends into chaos as Greg is forced to say yes to Portia, Justin and everyone else's "great ideas for the show."

Diana has been promoted again, this time to the head of the corporation that owns MMN, but before she leaves she finds herself embroiled in a sexual harassment scandal. This leaves Katie unsure who to believe - her mentor or her friends in the office. Carol becomes head intern and struggles to prove to the other interns, and herself, that she deserves the job.

Carol is devastated to learn that her parents are getting a divorce after 70 years of marriage. Katie, still hurting from her breakup with Jeremy, is convinced that love is dead, but Carol is determined to prove that it's never too late to have a happy ending. Meanwhile, Chuck discovers that the reason for Justin's newfound happiness is the cute new barista at the coffee shop and proceeds to compete for her affection at the expense of his and Justin's friendship.