. >> dana's story isn't shocking to scott macy, who says he counsels many high-achieving young womenen who have sold themselves for drugs. >> heroin addiction or opiate addiction is a physical as well as a mental, you know, and it's what we consider a brain disease. >> a former addict, scott macy knows firsthand the devastating impact of what is known as chasing the dragon. like dana, he lived a double life, going back and forth from his white-collar job to detroit's east side to feed his addiction. >> addiction just takes over any type of thought process, any type of -- you know, just takes over their life. and you know, it's just an obsession of the mind. >> dana says her $20-a-day fix quickly escalated to a $300-a-day habit. transforming her into a vulnerable fiend. >> a drug dealer who had been very fond of me kind of made me an offer i couldn't refuse where he said, i'll give you "x" amount of drugs if you let me, you know, sleep with you. >> the memories of selling herself remain a source of trauma for dana. >> the first time was obviously really hard on me, you know. i was so