16-year-old Henry Coles is an outsider in her new town of Reston, New York. With a major chip on her shoulder and no friends, she remains withdrawn and isolated, but everything changes when a traumatic encounter with a classmate triggers something deep within Henry— unleashing a power she cannot control.
When Cleo's boyfriend, Thomas, decides to sell Henry's car, Henry enlists the help of high school basketball star, Clay Boone, to steal it back. But when Henry experiences inexplicable seizures, things quickly escalate beyond her control.
After a visit with a neurologist, Henry hopes her new meds will fix everything. Meanwhile, Bill Boone attempts to identify his son Clay's attacker.
Rattled by her newfound power, Henry tests her ability with the help of Thomas's daughter, Jenna Hope, and fellow outsider, Townes Linderman.
After finding herself in an unknown place, Henry seeks out Jenna and Townes in search of some answers.
Left with no one's support, Henry returns to the unknown place only to discover a startling connection to her past.
While Henry returns to Reston with someone from her past, Clay faces some harsh truths about his new reality.
After Henry and Clay have a fight, Cleo tries to make amends by inviting the Boones over for dinner. But the evening takes a devastating turn.
As Cleo fights for her daughter's well-being, Henry battles her own inner demons.
As Henry sets out to find her mother, Cleo navigates an unwanted showdown between Bill Boone and his business associates.