Retired model cop Horst Bölkow continued filling notebooks with acribic records of anything legally questionable he witnessed, boring the precinct desk with countless petty complaints. His corpse drifts in the harbor dock, daughter Nina Bölkow 'blames' chief Reuter, to whom he attempted to make a 'major report' that morning. Horst Bölkow drowned while diving, drawn under unnoticed. His latest notebook is missing. Nina Bölkow's fiance, harbormaster Torben Gattermann, has an alarming past, Horst's boat neighbor Karsten Seitz also fits a plot.
—KGF Vissers