In her hand, she has a note that announces she is the last cage ever.
The Gladers take her to their Medical Room and one of their “runners” named Minho, says he noticed a dead Griever as he traveled through the maze that day. A Griever is and alien like monster that patrols the maze every night. This is a significant point in the plot because a Griever has never been found dead before and it may lead to many new discoveries. Minho takes Alby, the leader of all the boys, to go find and dissect the dead Griever. The two boys don’t return to the Glade all day and many worry for their safety. They finally return, but Alby is stung and they won't be able to make it back to the Glade before the gates protecting it from the maze close. Since they can’t make it, Thomas brakes the first of many rules and runs through the walls as the doors close to live a night in the
maze.
As soon as the doors close, Alby gets scared and leaves injured Alby with Thomas. Thomas then drags Alby from the ground and ties him into vines so he is protected. That night, Thomas kills a Griever and returns to the Glade with Minho and Alby alive in the morning. This has never happened before and Thomas is made a permanent runner and the girl, Teresa, wakes up from her deep sleep. Her and Thomas later discover a secret door to the maze where Thomas earlier pushed a Griever off a cliff which actually just sent it back to its home. After Thomas lead a team to escape, most of the volunteers fight the Grievers and die. Thomas and Teresa find the secret door again and enter a code they figured out escape the maze. They enter a research lab named W.I.C.K.E.D. The creators of The Maze made this test for the children so they could survive the Earth’s plagues and environmental crisis. Chuck, Thomas' best friend, is then killed and the Gladers’ are rescued and taken to safety. In reality, W.I.C.K.E.D set it all up and there is still much to come.