Steve Beard of Thunderstruck.org has written a superb article for National Review Online on how a fairly obscure rock and roll musician became interested in the subject of contemporary slavery and made a film about it:

The musical documentary Call + Response is Dillon’s ambitious and masterful artistic counterattack to an all-too-easy-to-overlook enemy who still sells men, women, and children like commodities to the highest bidders. The grainy, undercover film footage taken in Asian brothels is interspersed with the testimony of eloquent activists such as Gary Haugen of the International Justice Mission and actress Ashley Judd, as well as performances by the Cold War Kids and Matisyahu, the Orthodox Jewish reggae artist.

Beard describes the enormity of the problem as follows:

According to the 2008 U.S. State Department “Trafficking in Persons Report,” approximately 800,000 people are trafficked across national borders. That does not include the millions trafficked within their own countries. “Approximately 80 percent of transnational victims are women and girls and up to 50 percent are minors,” states the report. “Human traffickers prey on the vulnerable. Their targets are often children and young women, and their ploys are creative and ruthless, designed to trick, coerce, and win the confidence of potential victims. Very often these ruses involve promises of a better life through employment, educational opportunities, or marriage.”

The trailer to the film shows how ordinary Americans contribute to this horror. Dillon refers to the music in the film as "the sound of the 21st century abolitionist movement."

Dillon’s film is a highly laudable effort, and Beard’s article does an excellent job of introducing us to it.