Pornography is illegal in South Korea and molka, hidden cameras recording people without their knowledge, has emerged as an illicit DIY alternative. Now, criminal gangs are starting to install cameras on an industrial scale, selling people’s most private moments as pornography for strangers to consume.

Can those fighting molka stay ahead of this quickly evolving crime? And are the ingredients that have made molka an epidemic in South Korea a warning sign for a sex crime that could soon affect us here?