East Berlin, 1975: When Oberleutnant Karin MÞuller is called to investigate a teenage girl's body at the foot of the wall, she imagines she's seen it all before. But when she arrives she realises this is a death like no other: the girl was trying to escape - but from the West. MÞuller is a member of the national police, but the case has Stasi written all over it. Karin is tasked with uncovering the identity of the girl, but her Stasi handlers assure her that the perpetrators are from the West ­- and strongly discourage her asking questions. The evidence doesn't add up, and Muller soon realises the crime scene has been staged. But this is not a regime that tolerates a curious mind, and Muller doesn't realise that the trail she's following will lead her dangerously close to home . . .