In four more cases, forensic pathologist Dr Sam Ryan discovers her methods, investigations and conclusions don't always find favour with the police. Sam's ordered life is shocked by the arrival of Detective Superintendent Peter Ross. He is handsome, intelligent, ambitious - and an ex-lover. Peter and Sam fell out 12 years ago after Sam's evidence at a trial lost an important case - or so Ross believes. Has he forgiven her? Has she forgiven him? And more importantly, can they now work together?