Desperation in Death (In Death Series #55) by J. D. Robb

New York, 2061: The place called the Pleasure Academy is a living nightmare where abducted girls are trapped, trained for a life of abject service while their souls are slowly but surely destroyed. Dorian, a thirteen-year-old runaway who'd been imprisoned there, might never have made it out if not for her fellow inmate Mina, who'd hatched the escape plan. Mina was the more daring of the two—but they'd been equally desperate

Unfortunately, they didn't get away fast enough. Now Dorian is injured, terrified, and wandering the streets of New York, and Mina lies dead near the waterfront while Lt. Eve Dallas looks over the scene

Mina's expensive, elegant clothes and beauty products convince Dallas that she was being groomed, literally and figuratively, for sex trafficking—and that whoever is investing in this high-overhead operation expects windfall profits. Her billionaire husband, Roarke, may be able to help, considering his ties to the city's ultra-rich. But Roarke is also worried about the effect this case is having on Dallas, as it brings a rage to the surface she can barely control. No matter what, she must keep her head clear—because above all, she is desperate for justice and to take down those who prey on and torment the innocent.