He kills without a trace, choosing his victims at random. Profiler Thorsten Büthe is tough, incorruptible, and swears by his team. Experience and pain have made him what he is: a restless seeker. His gut feeling never deceives him, making him the worst enemy of the perpetrators. But this killer leaves no trace and selects his victims randomly. They lose their voice, then their lives. A stab in the throat, a cut across the neck. Exitus. Only dead eyes scream. Büthe has the murderer in his sights, but the killer turns the tables. No one can escape their own skin. The profiler is also a human and a father. Now, what he loves becomes prey. The beast within him awakens. He must act. Will he anticipate the next move of the perpetrator? Only on the high seas does the fate of both become clear.