Detective Frank Malloy is assigned to a new case - finding a missing woman who had been responding to lonely hearts ads in the paper before she mysteriously disappeared. Malloy knows the kind of drifters that use these ads to entice women. Worse, he knows they are likely to do much more than just kidnap their victims. Still trying to keep their relationship under wraps, Malloy seeks help from midwife Sarah Brandt. But as they delve deeper into a twisted plot that targets the city's single women, it's their partnership that ends up in the greatest danger.