party behind closed doors. >> you go into the room and then you negotiate a sex act with a masseuse. what i understand to be the going rate is anywhere from like $120 to $140 for a sex act. and usually you can get any type of sex act that you like. >> working as part of san francisco's human trafficking task force, health inspectors like walsh and dr. ojo have helped to shut down more than 80 illicit massage parlors since 2005. thanks in part to a new california law that makes it easier to obtain permits and dodge health department rules, the massage business here is roaring back. >> two years ago, the inventory was about 115 facilities. there has to be at least another 50. so yeah, there is a glut of new massage establishments. >> despite the setback, the task