Alex and Elliot argue over missing medication, and J.D. needs to choose sides. Meanwhile, Dr. Kelso gives Carla a ride to work and she sees a totally different side of him. Turk develops a conflict with Dr. Cox after he finds out that Dr. Cox has secret feelings for Carla.

When a rampaging Dr. Cox suddenly shows up at his door in a strange funk, J.D. sees a possibility of a breakthrough in their relationship - until he learns that Cox loses control in almost an annual rite. Meanwhile, Turk elects to partner with Elliot on a research project so that he can maneuver her back with his buddy J.D., and Carla struggles to fulfill a comatose patient's final request - playing heavy metal music in his room.