During a court-ordered meeting with a psychologist, schoolteacher Joanna Lindsay begins to recount her life as a troubled parent and wife via flashbacks. In one of these flashbacks, her Australian husband, Alistair, receives word that is ex-wife is preparing a custody battle over his teenage daughter Chloe. Reluctantly, Joanna decides to come with him as well as bringing their infant son Noah. While on a route flight to Australia, Joanna lashes out at a passenger when complaints of Noah’s crying get out of hand. After letting off steam, Alistair and Joanna continue their journey stopping into a shop to buy supplies. When they return to the car, Noah has mysteriously disappeared.
