When the pandemic took punters from Southeast Asia’s most notorious gambling dens, their gangster owners turned to the web, entrapping thousands of unwitting slaves and putting them to work in high-rises, aiming to scam western marks out of millions. Nathan Paul Southern and Lindsey Kennedy took a trip along the Mekong this summer. What they discovered was incredible and tragic in equal measure—and few are doing anything to combat it. Learn more about your ad choices. Visit megaphone.fm/adchoices