A new hotel. A historic city. A multiple murder.

The death of a hotel owner puzzles Detective Marilou Tetteroo. With the arrest of a suspect, the case seems quickly resolved. But as she scrutinizes the suspect's statement more thoroughly, there appear to be many - too many - gaps.

To check the alibi of the only suspect, she returns to the crime scene in the historic center of Delft. Her research in the hotel and its immediate surroundings leads to a startling discovery. Her night shift turns into a nightmare as she faces a gruesome series of murders ...