The Wall - Within The Walls (1)

THCO put them there, that's all they know.
Two groups, boys and girls, trapped in different walls, guarded by Titans and no clue how to escape.
And... no memory.
When the last one ever arrives they have to find a way out, but how? Through using the information of people's dreams or by using the secret script in someone's notebook.
And even if they could find their way out, will it be better outside the walls?

- An Attack On Titan/Maze Runner crossover