Dr. Brooks faces anger after a half-hour delay in delivering a donor heart that reduces the transplant's chances of success. The surgery is critical since the patient is Lucas Montclair's fragile younger brother. Conflict erupts between Clara, the chief purser accused of miscounting passengers and leaving Dr. Brooks behind, and Celeste, who defends herself from blame. Amid rising tensions, the flight prepares to depart, but the delay triggers a formal investigation ordered by Lucas to identify the responsible staff member. The episode ends with the outcome of the heart transplant and the staff’s accountability still uncertain.