India Eisley stars as Tillie Gardner, a girl who's been rocked to her core by the tragic death of her parents in a plane crash a few weeks ago. She copes with the help of local cab driver Niko (K.J. Apa), with whom she began a summer romance on the island of Nantucket. But what she doesn't know is that Marco (Scott Adkins), the man who sabotaged her parents' plane, is on his way to Nantucket to set another terrifying scheme into motion. Can she uncover his dark secret and gather her wits to stop him in time?