Tokyo, Japan. Umiko Wada has had enough excitement in life. With an overbearing mother and her husband recently murdered, she just wants to keep her head down. As a secretary to a private detective, her life is pleasantly filled with coffee runs and paperwork.

That is, until her boss takes on a new case. A case that is surrounded by shadows. A case that means Wada will have to leave Tokyo and travel to London.

London, England. Nick Miller never knew his father, and was always told he wasn’t missing much. But when an old friend of his late mother says there are things that Nick needs to know about his parents, he can’t ignore it.

When a chance encounter brings Wada and Nick together, they couldn’t know the series of violent events set off by their investigations. And when they discover Nick’s father might have been the only witness to a dark secret forever buried, they realise there are some powerful people who will do whatever it takes to keep it that way.