Charismatic DI Vivienne Deering leads an ace but unorthodox squad that tackles Manchester's most gruesome and off-the-wall crimes, including drug dealers, neo-Nazis, and black-market organ sellers. When strong-willed DC Dinah Kowalska connects a body at the morgue to a group of murdered girls with Down's syndrome, Viv and her team begin the hunt for a serial killer. What they uncover could leave even the most seasoned officers reeling.