Someone has been watching. Now the guilty will be punished. Several young women have recently drowned in Manchester’s vast network of canals. A coincidence? Or something more sinister? When star detective DCI Jane Phillips begins to investigate, her finely tuned instinct tells her these are no accidents. And when she discovers that each of the drowned women has a mysterious circular bruise on the back of her neck, Phillips is sure of it - she’s up against a very clever serial killer. But how are the victims being chosen? And who will be next? With the body count rising, Phillips and her team find themselves in a fight to the death with a shadowy figure who always seems to be one step ahead. Can Phillips stop the killer before the next victim dies? Or will she herself become an offering to Manchester’s deadly waters?