Derek (Alex Sharp) a brilliant college student, haunted by a childhood sighting, believes that mysterious sightings reported at multiple airports across the United States are 's. With the help of his girlfriend, Natalie (Ella Purnell), and his advanced mathematics professor, Dr. Hendricks (X-Files' Gillian Anderson), Derek races to unravel the mystery with FBI special agent Franklin Ahls (David Strathairn) on his heels.