A young boy named Adam is a human boy, in a time of history 300 years in the future from now. Angels reveal themselves at last, the moment mankind stepped foot on Mars. Humans have been enslaved by the angels ever since, and their souls are used as slaves too, no human goes to heaven, as 'God has finally looked away'.
The world is used as land for Angels, and the remaining humans are only used for breading for future soul slaves.
A young boy escapes thanks to his mother. There is a good angel (grandfather), looks after him, and introduces him to his granddaughter who has always been excited to one day meet a human, as she was taught that there are good ones.
An incident occurs and they have to fend for themselves, but they don't only do that, they also intend to over through the matriarchal rule of heaven, and free the humans once and for all. This event was only possible by the 'great emancipation', when younger angels saw the injustices caused by their elders finally.