Maddie, a bullied teen, receives help from a stranger online; Caspian, a teen loner and maths genius, struggles with his parents' toxic relationship; Chanda, a computer engineer, secretly meets with a rival tech giant.

Chanda's life is on a loop; Maddie and David make up for time lost; Ellen tries to move on from her dead husband; Caspian watches his parents' marriage disintegrate while trying to start a romance of his own.

David learns how to maximise his power from an unlikely source; Maddie and Ellen find out they aren't alone; Cary questions the plan; Caspian gets closer to Hannah and the truth; Chanda seeks revenge.

Caspian fights to learn the truth about his identity; an unlikely team builds David a new home in a familiar place; David and Laurie fight to evade those who are trying to delete them.

The flaw takes its toll on Laurie; Caspian's and Maddie's worlds finally collide; Chanda builds his own reality.