On a large clearance, a group of young people surrounded by an obviously insurmountable wall and an apparently endless labyrinth awakens. A gate that opens in the morning and closes in the evening connects the clearance and labyrinth and protects the young people from the dangerous creatures at night that inhabit the labyrinth. They don't know who they are, where they come from and why they are in this place.
Confronted with their own strangeness, the young people experience how their identity forms from memories, how strangers become friends and how courage is born to each other from loyalty to fight for freedom.
Terry, the person who is most recently received, and the other girls have to pass numerous exams. They embark on a number of dangerous expeditions into the labyrinth, challenge each other and try to solve the puzzle of their captivity before it is too late.