How do you solve a murder when you can't ask any questions?

East Germany, 1975.

Karin Müller, sidelined from the murder squad in Berlin, jumps at the chance to be sent south to Halle-Neustadt, where a pair of infant twins have gone missing. But Müller soon finds her problems have followed her. Halle-Neustadt is a new town - the pride of the communist state - and she and her team are forbidden by the Stasi from publicising the disappearances, lest they tarnish the town's flawless image. Meanwhile, in the eerily nameless streets and tower blocks, a child snatcher lurks, and the clock is ticking to rescue the twins alive . . .