In a factory town, pregnant women are dying one after another. The police can’t track down the serial killer, and a young teacher and her students—“Squad 15,” as they call themselves—take on the hunt. One of the boys’ sisters has fallen victim to the criminal, and the teacher is pregnant herself, so this case is personal for them. They risk their lives because the killer is smart and ruthless: he anticipates every move the police make and draws the amateur investigators into his elaborate plan. But the children—whom almost no one pays attention to—see and hear far more than adults do, and that means “Squad 15” has a chance to outwit the clever villain…