Tilly Gardner (India Eisley)'s parents died in a plane crash, which made her depressed. The appearance of Nantucket Island driver Nico (K.J. Apa KJApa) changed everything and made Tilly fall in love with him. But as she got along with Nico, Tilly gradually discovered that his identity seemed not simple, and was inextricably linked to the plane crash that killed Tilly's parents. On the other hand. The intervention of FBI agent Cantrell (James Remar), who was bent on revenge for Tilly's father, made things more complicated. On Nantucket Island, a crisis seemed to be brewing...