In the wake of a global internet shutdown, Maddie joins Caspian in a race to select the one uploaded intelligence who can protect humanity against the other ghosts in the machine. New allies, enemies, and lifeforms will change our world forever.

Maddie, a bullied teen, receives help from someone online. It turns out that the person is her deceased father, David. His consciousness has been uploaded to the cloud after an experimental brain scan. Turns out, he's not the only one.