Nearly two years since we last saw Sarah Collins, we catch upwith her as she is called to the brutal stabbing of a teenager.Her investigation soon finds itself at cross purposes with acovert operation led by Kieran Shaw, who is working withSarah's old partner, Steve Bradshaw, now deep undercover.Lizzie Adama meanwhile, is back at Farlow trying to balanceher new role as a Detective with a family life. Her path andKieran's are about to cross
