In 2014, two years after the film's release, the anti-trafficking charity Breaking Out announced it had investigated the claims of Chong Kim, whose story the film is based on. It claims it debunked her stories as false, though it did not publicly release the information that led them to this conclusion.
There is a scene in the movie in which each of the girls are wearing numbers, so that the "customer" can select who he wants more easily. Eden is wearing the number 7. In South Korean culture, the number 7 is considered a lucky number.