Nefarious: Merchant of Souls is a 2011 American documentary film about modern human trafficking, specifically sexual slavery. Presented from a Christian worldview, Nefarious covers human trafficking in the United States, Western and Eastern Europe, and Southeast Asia, alternating interviews with re-enactments. Victims of trafficking talk about having been the objects of physical abuse and attempted murder. Several former prostitutes talk about their conversion to Christianity, escape from sexual oppression, and subsequent education or marriage. The film ends with the assertion that only Jesus can completely heal people from the horrors of sexual slavery.

Nefarious was written, directed, produced and narrated by Benjamin Nolot, founder and president of Exodus Cry, the film's distributor. Nolot, who travelled to 19 countries to collect the film's content, said that the purpose of the film is "to draw people's attention to the issue, but also to inspire them in terms of what they can be doing … to take a stand against this injustice." The film was officially released on July 27, 2011, with individual grassroots screenings also taking place. Laila Mickelwait, Exodus Cry's director of awareness and prevention, screened the film in several countries in an attempt to persuade governments to make laws similar to Sweden's Sex Purchase Act, which criminalizes the purchasing rather than the selling of sex. The film was released on home video on May 1, 2012.

Interviewees in the film include Canadian journalist Victor Malarek, Jerusalem Institute of Justice founder Calev Myers, Christian therapist Dan Allender, clinical psychologist Melissa Farley, Piet Keesman, Baptist missionary Lauran Bethell, Agape International Missions founder Don Brewster, anti-trafficking activist Helen Sworn, former prostitute Annie Lobert, and Swedish detective superintendent Kajsa Wahlberg. Ted Baehr of Movieguide, a Christian magazine, called the film "a powerful, compelling and transformational documentary about human trafficking and sex slavery" and commented that it covered the inherently sexual subject matter candidly without displaying nudity. Dan Preston of Godculture Magazine praised Nolot's writing and directing. Nefarious has won film awards, including the Honolulu Film Award for best screenplay, the Urban Mediamakers Film Festival best documentary feature award, and the Indie Fest feature documentary award of excellence.