This is fic is very dark....

In a futuristic universe, slavery is legal and widely practiced, especially among the elite. Free people can be slaves only if they choose to be (by willingly signing an aggrement to forfeit their freedom), or if they were born into it. There are two types of slaves, those who can be freed by their masters and others can't be freed and must remain slaves all their lives as well as their offesprings, called the untouchables. institutions that train and sell slaves are present all over the country. 

Orlando Bloom, a famous human right activist, has made many enemies by fighting and attempting to abolish slavery...ones who wanted him silenced, either by death or by something else more profitable to them....

one night, he was kidnapped and taken to a slavery training institution to be turned into an untouchable slave, before passing him into the highest bidder.

Needless to say, the story must contian non-con, humilition, BDSM, and so on.

Good Luck