The murder of his wife, Rachel, is followed by a computer hacking attack at the bank where he works. Then Ethan Harris is mugged on the street and his belongings stolen. When DCI Scott began looking into the murder he found that Harris was deeply in trouble due to gambling so he became a prime suspect. When Harris looked into Rachel's things, though, Harris saw a connection to GCHQ, MI6, and the German BND. And Amy Knight, known to none of these, was seeing other intriguing items.