No one has ever survived a night in the Maze. While in a competition with another boy named Gally, the boy suddenly remembers his name: Thomas. The next day, he is attacked by Ben, a Runner who has been stung and left delirious by a Griever – deadly techno-organic creatures that roam the Maze at night. Ben is forced into the Maze and left to die, as there is no cure for his condition. Alby and Minho, the lead Runner, later retrace Ben's steps inside the Maze. Minho reappears at dusk dragging Alby, who is stung, but they are unable to reach the closing entrance in time. Thomas runs into the Maze to help, leaving all three trapped. Thomas lures a Griever into a closing passageway, causing it to be crushed. The trio manages to survive the night, returning the next morning. The first-ever girl arrives in the elevator, with a note saying that she is the last one to enter the Glade. She recognizes Thomas, though he cannot remember her. Thomas, Minho, Frypan, Winston, and Zart enter the Maze, locate the Griever corpse, and remove a beeping mechanical device from inside it. Gally claims Thomas has jeopardized the fragile peace between the youths and the Grievers and wants him punished, but Newt, the group's second-in-command, instead designates Thomas as a Runner. Minho shows Thomas a hand-constructed model of the Maze based on previous exploration. The Maze's numbered sections open and close in a regular sequence. Thomas realizes that the device corresponds to a section within the Maze. The girl, Teresa, has two syringes filled with an unknown substance. One is used on Alby, and he recovers from the Griever sting. Minho and Thomas venture back into the Maze with the device and discover a possible exit. A laser then scans the two, and the exit closes. Thomas and Minho start to run away as traps activated by lasers nearly kill them. That night, the Maze entrance does not close while others open, letting Grievers pour in. A massacre ensues as the Gladers struggle to fight back or hide. Alby, Zart, Clint, and several others are killed. Afterwards, Gally punches Thomas and blames him for everything that happened. Thomas, who has been having disconnected memory flashes since arriving, stabs himself with a severed Griever stinger in an attempt to revive his memory.