A group of nuns have disguised themselves as prostitutes with the aim of combating human trafficking.
The group, named Talitha Kum has about 1,1000 nuns. They launched in 2004.
"I'm not trying to be sensational but I'm trying to underscore the fact this is a world that has lost innocence ... where dark forces are active," said John Studzinski, an investment banker and chairman of Talitha Kum.
The group have previously dressed as prostitutes so they can infiltrate brothels.
"These sisters do not trust anyone. They do not trust governments, they do not trust corporations, and they don't trust the local police. In some cases they cannot trust male clergy," Studzinski said.
"They work in brothels. No one knows they are there."
The charity said that about 73 million people are trafficked around the world. Studzinski said one woman was locked up for a week without food when she refused to have sex with 12 clients a day.
In another case, another woman was forced to have sex with a group of 10 men at one time.