Basically, the secretary has been embezzling from the company for about a year and a half. The boss, a rich single man who's known to be cruel, finds out. He offers her the choice of jail, or to move into his home and be his personal servant. If she choices the second option, she loses all rights. She's essentially his to do with as he pleases.
I see this going to some extremes as he can live out all his dark fantasies. I also see her no longer working for his company, but there with him scantly clad during the day for whenever or whatever he needs her for, be it waiting on him hand and foot to pleasuring him under his desk during meetings or even putting on shows for clients. Sky's the limit.