A dangerous psychopath has taken over Berlin's leading radio station and is holding everyone inside hostage in the terrifying and twisted new thriller from Sebastian Fitzek.

This morning a dangerous psychopath is playing an old game with new rules. He's taken six people hostage at Berlin's leading radio station.

Every hour, a telephone will ring somewhere in Berlin. Maybe it will be in your house. Or your office. And if you can't play the game, a hostage will die.

Renowned police psychologist Ira Samin is rushed to the scene, where she is forced to negotiate live on air.

With the nation listening, the kidnapper makes his sole demand: find his fiancee and bring her to the station.

But she is dead. Burnt to a crisp in a devastating car accident eight months ago.

Facing an impossible demand and a police commander who seems hell-bent on keeping secrets, Ira must race against the clock to resolve one of the hardest negotiations of her career.

All the while, somewhere in Berlin... a telephone is ringing.