Thomas (Dylan O'Brien)is taken on a place named Glade, A giant labirin surrounded by satan creatures called Grievers. He cannot remember anything. Glade is inhibited by so many teenagers whereas each of them has a special job. Along time goes by, Thomas just realizes that those kids have been trying to get out from the labirin within two years and avoided sting's Grievers and get their old memory back.
Each month, a new kid comes. But after a girl just came with a message that she is the last. she is just experiencing coma. Thomas realizes that she can hear the girl speaks on his head and when he wakes up, they unify each other trying to find a way to escape.