For Parish and Richards, what begins with the discovery of a small heart carved into the forehead of a murdered young woman, turns into the search for a prolific serial killer called The Lover, and involves the Met’s Serious Crimes Investigative Team (SCIT) descending on them to lead the investigation. Xena and Stick investigate when a mother and three children are murdered at a farm, which also has a Donkey Sanctuary where they get up close and personal with Huckleberry and Pickle. Their main suspect – the father – is missing, but are things that simple? Jerry, Shakin’ and Joe have to write a report on the unsolved murder of Emily Hobson, but when they begin to check out the facts they uncover something a lot more sinister. A ten-year-old boy comes into Abacus Investigations and asks Kowalski to find his missing mum, because he thinks that his dad might have murdered her and disposed of the body, but things are a lot more complicated than that.