John "J.D". Dorian unexpectedly finds himself back at Sacred Heart, reuniting him with new and old faces.

J.D. navigates a new normal, while Elliot and Turk clash over the budget.

Elliot faces a dilemma with a stubborn patient, while J.D. discovers online doctor reviews. Meanwhile, Turk teaches his interns about new surgical technology and unexpected life lessons.

To relive their glory days, J.D. plans a poker night with Turk. Elsewhere, competition brews between the medical and surgical interns, while Elliot decides how to handle a social media-obsessed patient.

J.D. ventures into the world of post-divorce dating with Turk's guidance. Elliot gets creative when sourcing an organ for a beloved elderly patient, while the interns learn about the unspoken rules of the hospital.

J.D. and Dr. Park are forced to work together when a member of the hospital board experiences a mysterious health crisis. Turk helps Elliot navigate a newfound romance, while the interns practice vulnerability with patients.

While J.D. is upset to not be invited to Turk and Carla's annual barbecue, he takes the opportunity to nurture his friendship with Carla at work. Turk teaches the surgical interns how to deliver bad news.

J.D. has finally hit his stride as the new chief of medicine, only to be shaken by an unexpected visit. Meanwhile, Elliot grapples with being a good mentor for the interns while still holding them accountable.

A chaotic day at Sacred Heart forces the doctors and interns to face burnout, life-changing decisions, and their relationships with one another.