Thomas is introduced into a new world called the Glade. All of his previous memories have been erased, all but his name. He struggles to believe he was sent here for some reason. He is quite startled by the new world around him.
Thomas meets different kinds of people. Alby, Newt, and Chuck. He soon realizes that they can be his friends or even his enemies if he's not careful enough. Thomas asks for many questions but receives no answers, instead he just has more questions.
Thomas gets to learn more throughout the glade. He and Chuck become somewhat friends. He learns Gally isn't the best person to hang around with. However he survives his first day in the glade, the though of surviving frightened Thomas.
During his tour in the next morning, something unusual happens. The box comes up, with only happens every week at the same time. Inside they find a girl, with the message "She is the last one, ever" The med-jacks then take her away until she recovers.
Thomas works in different roles to get used to the glade. When he visited the graveyard, he is attacked by Ben who claims he is evil. He is then subdued and later banished into the maze.
Newt appears to be nervous about something, he then reveals to Thomas that Alby and Minho haven't come back from the dead griever. When Thomas sees them slowly coming, he runs into the maze and is locked from safety, and into the griever filled maze.