A young therapist is assigned to counsel a group of survivors after a commercial airplane crash. Leading the group therapy, she tries to help the passengers cope with their trauma and piece together their memories of the incident. Among her patients is a particularly enigmatic man who seems to have an unusually positive outlook despite the crash. As she delves deeper into their recollections and personal stories, she encounters inconsistencies in their accounts and begins to notice unsettling gaps and contradictions.

While trying to uncover the truth, she forms a closer bond with the enigmatic man, who exhibits both charm and perplexing knowledge about her life. Her investigation leads her to clash with the airline, which is keen on maintaining a specific narrative about the accident. Her determination to uncover what really happened puts her at odds with other passengers and triggers a series of disturbing events, pushing her to question the nature of reality and her own perceptions.