Five years ago, Nora Mercer vanished into the woods behind her home.
Three days later, she came back.
Alive.
Unharmed.
Different.
No one asked the questions that mattered. Not her family. Not the town. Not even the police. Because something returned-and that was enough.
Until now.
When a hidden chamber is discovered beneath the Mercer house, the truth begins to surface. A place where children don't just disappear... they are kept. A place where something watches, waits, and replaces.
And when a second voice calls out from below-weak, desperate, and unmistakably Nora-everything unravels.
Because the girl who came back...
Was never the one they lost.
As the past collides with the present, one question remains:
If she came home...
who was left behind?
And what, exactly, came back with her?