Onboard a flight, Mrs. Montclair confronts the chief purser Celeste, blaming her for a disastrous headcount mistake that left a passenger, Dr. Brooks, off the flight. Despite Celeste’s denials, evidence and witness testimonies accuse her of negligence. The captain confirms Celeste falsely reported all passengers were onboard before departure. Tensions escalate as Mrs. Montclair warns that if her son doesn't survive surgery, Celeste will be held responsible. Mr. Montclair promises to reveal surveillance footage to settle the dispute, but the episode ends with the shocking news that Mrs. Montclair’s son's heart has stopped, leaving the outcome uncertain.