The body of a young man was found in the Black Sands reservoir. The authorities immediately recognize this as just an accident, but Kate Marshall and her assistant Tristan Harper are sure of the opposite. What was the deceased doing in the pond in the middle of the night? He was a great swimmer, how could he drown? With each step, the investigation reveals more and more dark secrets.What if this is a whole series of bloody murders committed over the course of decades? A mysterious killer hides in the fog, stealing victims like a ghost. He is silent. Ruthless. Leaves no trace.When another woman is kidnapped, Kate and Tristan realize they only have days left to save her.