Season 1

At age six, Emery Whitehill's small town is shaken when an alien spacecraft crash-lands there, and she meets Roman, a six-year-old Atrian boy who seeks refuge with her before authorities take him away. A decade later, they are reunited as the initial cohort of Atrian teens enters high school, part of a highly scrutinized social experiment to determine whether humans and Atrians can coexist peacefully. Both are startled by the parochial attitudes displayed by their communities. Roman's sister Sophia eagerly anticipates making new friends, while fellow Atrians Teri and Drake openly distrust humans. The human students share the wariness toward the aliens, with the school's queen bee, Taylor, standing out. Kind-hearted Grayson feels drawn to Emery, yet harbors a secret that could jeopardize their budding friendship. Only two of Emery's friends—Julia and Lukas—appear capable of accepting the Atrians. Emery and Roman are drawn together once more, though external pressures strive to pry them apart.