Music is her life. 15 songs decide how long it lasts. A month ago, fifteen-year-old Feline Jagow disappeared on her way to school. Her distraught mother asks private investigator Alexander Zorbach, a former police detective, to discover her whereabouts. Despite a month having elapsed since her disappearance, Feline’s music playlist was changed just a few days ago. Could a seemingly innocuous list of songs contain a hidden clue to where the girl is being held and how she can be rescued, or is the truth something more sinister? Soon, the mystery of the playlist plunges Zorbach into a horrifying nightmare that mixes past terrors with new ones, and where no one’s survival is guaranteed.
