Work is underway on the destruction of deadly substances in a sealed-off factory under the highest security precautions. Then the lead chemist Dr. Diestel kidnapped. A cartridge of sarin gas is stolen with him. A poison that kills silently, invisibly and odorless within a few minutes. Enough for an attack, enough for an act of terrorism. As quietly and unnoticed as the theft took place, the hunt for the perpetrator must also be secret. Do not stir up panic and no invitation to free riders, so prosecutor Anton Mehringer. He entrusts Sarah Kohr with the investigation - without a stir, but with full authority. She finds out that there is no terror cell behind the theft, but that the perpetrator was guided by a very personal motive for revenge. When Sarah Kohr can secure the warfare agent, the nightmare is far from over, but escalates into an immense threat.

Two policemen are stationed on Amrum, a North Sea island on the West coast of Schleswig-Holstein, Germany’ – an elder, and one who is several decades his junior. Life is easy, just that the junior can’t find a wife, because no young woman seems to be interested in the peaceful life on the island. All of a sudden, a wounded lady who turns out to be one of two bodyguard for a threatened witness who lives in hiding on Amrum, bursts into the police station and seeks help from the two officers. I missed some bits of the plot, but somehow, the second one of the bodyguards hiding the witness on the island has been killed already, and the second one, seeking help from the local police, was wounded in the incidence, and then she apparently succumbs, too.