London, 1878. A mysterious crime was committed on the Thames - the body of a young girl was found among the rose petals in a boat sailing downstream. The daughter of a famous judge turns out to be dead, and the senior inspector of Scotland Yard Michael Corrawan takes over the investigation. A former boxer and port worker from London's seedy East End, Corrawan has good street sense and a knack for evidence, but he is very surprised when a second woman is found dead in a boat exactly a week later, and then a third...