Iain Fraser hails from Helensburgh. He has been away for a long time serving a prison sentence. Now he is back and must do what his boss expects of him, no matter how, no matter what. But killing an innocent woman is incredibly dark. Iain can't shake that off. Meanwhile, Detective Inspector Alex Morrow is faced with a mystery. Roxanna Fuentecilla, who was under police surveillance, has disappeared - quite embarrassing, especially since the Spanish woman is involved in a case of economic crime that was supposed to help the newly streamlined budget of the investigative department. However, the body found floating in Loch Lomond is not that of the missing woman. Morrow now has a murder case on her hands, which leads her to Helensburgh. Denise Mina, celebrated in the UK as the Queen of Tartan Noir, writes intricately woven page-turners with sharp edges. Blood Salt Water alternates between them.