Towards the sunlight

Six teenagers band together in an attempt to escape an imprisonment that is all that they'd known. They don't remember a time before that and they don't know of the world outside.
Outnumbered, their first attempt fails, at the cost of one of their own, Riley. But before he's shot, they get a glimpse of what appears to be memories, of a different him. One in a high school, where he is not the stern figure he was as he died, but a rather dull weak willed kid who stares emptily towards his future.
As the visions end the remaining five are left confused and bewildered as the truths are enveilled within it. They strive to peice more and more together as they are sent back to their high security dorms.
"In this place you don't know who you are but the answers all lie within"