It is one of the hottest days of the year when Stuttgart journalist Tessa Steinwart discovers a body on the banks of the Neckar. A young girl, wrapped naked in a white sheet, covered with rose petals, showing signs of years of torment. No one seems to know her, no one is missing her. Shortly thereafter, Tessa and her young son become the target of the murderer. He seems to know everything about them - and it is only a matter of time before he strikes again...