Inspector Conny Sjöberg and his police colleagues are perplexed by the brutal killing of a family in their Stockholm apartment.

With no clues, the murder inquiry starts with working out how it was possible for the mother, who worked as a cleaner, to afford a multi-million dollar property?

An under-strength team - with officers ill, injured or mysteriously missing - is not Conny's only problem. From a woman he cannot get out of his head, to a shocking revelation about his own past, everything is threatening to compromise the hunt for this heartless killer...