The world has changed. Nature isn’t what it used to be and lumins, a non-breathing kind of human, have arisen. In this new reality, regular breathing humans are enslaved, poor and sometimes caged like animals. This is exactly the situation Fifteen finds himself in, as he cannot remember life outside of the glass cage.
One day, a lumin buys him as a slave and he is released from the cage. Fifteen prepares for a life of misery, but what he gets is something completely different.
A tale of revolution and forbidden romance begins to form.