J.D. is asked to introduce Dr. Kelso at an awards dinner, so he wants to find out something good about him. Dr. Kelso and Dr. Cox each have a patient, whom they feel deserves the benefit of a new experimental treatment, but there is only one open slot. Elsewhere, Carla and Turk try to help Elliot get her old job at Sacred Heart back. And the Janitor taunts J.D. with the made up game of "Jiggly Ball."

A Croatian Doctor comes to Sacred Heart, only to find out that he has to redo his Internship there.

J.D. shows symptoms of 'Vasovagal Syncope', a condition that causes fainting and blackouts.

Turk and Elliot argue over whose turn it is to take care of him, whilst Carla tries out her new excuse "I have a baby" and the Janitor takes a vacation.

When Private Dancer is released from the hospital, the military informs him that his injuries are too severe to be reinstated into the service, so he gets depressed. The Sacred Heart staff try to cheer him up, while the Janitor is having a fish problem.

When Keith leaves town for a few days, J.D. expects that he'll finally be able to spend some quality time with Elliot. But he doesn't anticipate Elliot's old college friend dropping by. J.D. switches between hitting on her and competing with her for Elliot's attention. Meanwhile, Turk and Dr. Cox volley a hypochondriac patient back and forth since there's nothing wrong with him.

Turk tries to assure a worried Carla that their daughter will acknowledge her Latin heritage. Meanwhile the Janitor challenges J.D. to identify everyone in the hospital, when it is discovered that he uses nicknames, because he doesn't know the people's actual names. If J.D. can't name all of them, he must take up the mop for a day. Elsewhere, Dr. Cox realizes that he is lonely without his wife and children.

As his increasing workload from being Chief of Medicine begins to take a toll, the unimaginable happens when Dr. Cox reaches out to Dr. Kelso for friendship.