While trying to uncover what has been making Alex's allergies flare, Whitney reveals a heart condition that has plagued her since childhood. Meanwhile, Lily introduces the gang to her new beau, but they find that he tends to have a hard time getting to the point and Mark, Roxanne and R.J. find themselves rushing to finish his sentences.

When Whitney is contacted by a terrible ex-boyfriend who is looking to make amends, Alex warns her to stay away, but Lily encourages her to arrange a meeting. However, when Whitney meets him she finds out that old habits die hard and Alex is forced to defend her honor. Meanwhile, R.J. reveals to Roxanne that she may have a thing for Mark.

In an effort to have some time by himself, Alex lies to Whitney about going away for a tech seminar. However, Whitney soon uncovers the truth and makes them go to couple's counseling. Meanwhile, to Lily's surprise, R.J's eight-year-old niece takes a liking to Roxanne.