The Bremen chief inspector Inga Lürsen and her colleague Stedefreund are investigating in the mobile communications industry. Sandra Vegener, only recently released from a psychiatric ward, kills a judge and then herself. She had previously claimed that her daughter had died of leukemia as a result of radiation from cellphone masts and had taken vehement action against a cellphone company. The prosecutor responsible, the judge and the psychiatrist then classified her as mentally ill. Inga Lürsen and her colleague Stedefreund get deeper and deeper into a dense network of secrets and intrigues: Why is the public prosecutor lying? Why did the cell phone company pay money to the husband?