In this long-awaited sequel to bestselling "Invisible Trade: High-class sex for sale in Singapore", Gerrie Lim unravels the secretive double lives led by Singapore's beautiful, upscale escorts and other sex workers. There's the girl who works at a public relations agency by day and moonlights as an escort by night, the karaoke-bar mamasan who deals in wild and wanton girls from mainland China, the American male escort who gets paid by visiting Shanghai socialites for his companionship both in an out of their hotel bedrooms, and the Singaporean university student who freelances as a bondage model. Male customers include the Englishman who went on a rabid sex spree in Singapore's red-light district, and the self-proclaimed diehard sex tourist from Los Angeles who came to Southeast Asia to sample its professional paragons of feminine perfection, finally facing his nemesis among the night birds of Singapore.