Following a plane crash, police chief Jo Evans takes in one of the survivors who turns out to be pursued by mysterious assailants, putting Jo's family on the line.
Jo's investigation into the crash reveals inexplicable events. Piper comes clean to Jo as she starts to remember what happened.
Jo looks into the connection between a tech billionaire and the crash. A sudden bout of illness reveals a shocking truth about Piper.
As Jo uncovers more details about Piper's past, a revelation about her abilities leaves Jo hesitant to keep her in her house.
In the wake of a tragic death, Jo scrambles to put the pieces together to bring Kindred down, a mission that proves taxing as he comes after her and her family.
An attempt to test Piper's powers leaves Jo's family reeling. Jo learns more about Piper's creation and Kindred's crimes.
Emily puts her nefarious plans into effect as she tries to manipulate Piper. Jo goes on the offensive to counter Emily's control of Piper.
As Piper's powers evolve, Jo's investigation is hindered by the arrival of an FBI agent who makes her search for Emily harder.
As Jo looks into the culprits behind the explosion, Helen uses Ed's cancer as a way to get Jo to surrender Piper. Jo is left reeling in the wake of a sudden betrayal.
As Jo and Ryan look into Benny's background, Piper attempts to get a message out to Jo. Ryan and Jo's investigation reveals the extent of the AI's integration into human society.
As Piper works to undermine Helen, Jo proves willing to do anything to locate Piper and bring her home, even if it means accepting Emily's help
Jo uncovers more information about Helen's history and her plans to gain more powers. Jo and Ryan go head-to-head with Helen.
With Helen's powers growing, Jo and the others are left in peril. Piper risks everything in an attempt to contain the threat.