Jo Evans plunges her family into a deepening mystery when she discovers a young girl on the night of an inexplicable plane crash and decides to protect her.
As Jo continues to search for answers, a mysterious man's appearance in town may cause problems for the family. Piper tries to understand her new abilities while connecting with the family.
A mysterious illness takes hold of Piper; Jo and Benny investigate a powerful tech mogul, Richard Kindred; Jo considers accepting help from an unknown source; Alex works to decipher a radio frequency code from Piper's plane crash.
Jo and Benny investigate the death of Kindred's former business partner. Mia helps Piper discover her powers. Alex wants to know why Ed is choosing to die.
The FBI arrives in Southold, complicating Jo's efforts to find Emily. Meanwhile, Alex and Piper hunt for answers on a road trip, and the family celebrates Mia's birthday.
Jo and Chris have to evade the FBI while investigating the cyber terrorists. Ed receives a treatment plan for his cancer that seems to good to be true. A mysterious woman puts Piper and the Evans family in danger.