Umiko Wada never set out to be private detective, let alone become the one-woman operation behind the Kodaka Detective Agency. And with her former boss recently deceased in mysterious circumstances, Wada is careful to choose the cases she takes very carefully.

But her interest is gripped by a mysterious businessman who wants her to track down his estranged son. But she should have known that the simplest cases are never what they seem. Soon she finds herself pulled into a labyrinthine conspiracy with links to a twenty year old investigation and to the chaos and trauma of the dying days of the Second World War.

As Wada uncovers a dizzying web of links between then and now, it becomes clear that someone has gone to extraordinary lengths to keep the past buried. And the deeper Wada digs, the more danger she finds herself. Soon those she loves most will be sucked into the orbit of one of the most powerful men in Tokyo. And he will do whatever it takes to hold on to that power...