Daryl Hannah is planning to spend Christmas exposing human trafficking. The stunning actress will put her life in danger by going undercover into sex dens for a TV documentary. It is hoped the controversial film will expose the practice of women "slaves" who are shipped around the world to work in the sex industry. The star, who is jetting to a secret location, said: "There are more slaves now than at any other time in history. There are 30 million in the world right now. Many of them are slaves in the labor field, but 75 percent are in the sex trade and of those 75 percent most are young women." She is quoted in Scotland's Daily Record newspaper as adding: "I'm going over there with a friend of mine and we are going to go undercover. We're going to dress like a twisted couple and go into the brothels. My friend actually rescues slaves. He busts them out and rescues them."