The Other Mother (2017)

After accepting a nannying job for a young girl named Sophie, Summer Pratt starts to notice just how peculiar she is, and how indifferent Sophie's parents are to her strange behavior.

Bill Marks is a burned-out veteran of the Air Marshals service. He views the assignment not as a life-saving duty, but as a desk job in the sky. However, today's flight will be no routine trip. Shortly into the transatlantic journey from New York to London, he receives a series of mysterious text messages ordering him to have the government transfer $150 million into a secret account, or a passenger will die every 20 minutes.