When the doors of the lift crank open, the only thing Thomas remembers
is his first name. But he's not alone. He's surrounded by boys
who welcome him to the Glade - a walled encampment at the centre
of a bizarre and terrible stone maze.

Like Thomas, the Gladers don't know why or how they came to be there
- or what's happened to the world outside. All they know is that
every morning when the walls slide back, they will risk everything
- even the Grievers, half-machine, half-animal horror that
patrol its corridors, to try and find out.