Jac's job and livelihood are at risk when a mystery patient arrives on Darwin and seeks her help. A short-staffed Keller welcomes a new face to the team. A distracted Oliver has his mind preoccupied with a special surprise for Zosia, leaving Fletch feeling overloaded.

When a personal emergency strikes, Mo makes a heart-wrenching decision. When Nina oversteps the mark with a patient on AAU, her judgement is called into question. Is it first-day nerves or is there more than meets the eye? Essie's teasing of Raf results in a surprising revelation.