Parish and Richards investigate a case involving recently pregnant headless bodies disposed of in the sewers. Not only do they struggle to discover the identity of the victims, but they can't find the babies either. Kowalski and Nash investigate the death of a landlady who has been bludgeoned to death and a withered flower left on the body. Also, Parish finds out who is father was, somebody wants Angie's baby, and Richards has another relationship disaster. Oh, and a favourite comes back for a while...