What the dark waves wash up at the banks of the Frankfurt Main at night is gruesome. The young woman is dead, her hands severed and her body swollen. It is clear: somewhere in the canyons of the menacing skyscrapers lurks a ruthless murderer and a dark secret. Although the BKA (Federal Criminal Police Office) has taken over the investigation, Jo Lasker is to investigate the case under the highest orders. To solve the case, he needs a team willing to dive into the swamp of crime beyond legal boundaries. When he believes he has found the right people for the task, he has no idea that they will soon all be in mortal danger. Yet the truth must come to light, no matter how disastrous it may be. With his fast-paced and dark Frankfurt thriller, author and professional investigator Jens Bühler leads readers into the depths of crime.