As Elliot begins to plan her wedding with Keith, J.D. continues to question his true feelings for her. In an attempt to ease his best friend's mind Turk takes him to a surgeon's convention in Phoenix, but the plan backfires when J.D. runs into his ex-girlfriend Kim and discovers that she had lied to him and is, in fact, still pregnant with their child. Meanwhile, Kelso and his cronies party it up at the convention while unknown to him, the Janitor takes on the role of chief of medicine back at Sacred Heart.