The second stunning thriller from a brilliant new writer, continuing the story of Reuben Maitland and Genecrime.

Reuben Maitland, brilliant scientist and devoted father, was once the head of Genecrime, the UK's elite forensic unit. But in his single-minded quest for the truth, he violated one of the sacred tenets of his profession and used his greatest forensic discovery for his personal gain. Now he is paying the price. His family and career have been stripped from him. Another man has become father to the son he barely sees. Shunned by his former police colleagues at Genecrime, Reuben and his partner Mornay McCornack are forced to accept jobs from some of London's most hardened gangsters.

But someone is raping and killing women in the capital and the brilliant scientists at Genecrime are stuck for leads. Then Reuben receives a mysterious message, promising a large sum of money if he can solve the mystery of prisoner Michael Brawn, convicted on false DNA evidence. With time running out, Rueben must cast his grudges aside and help his ex-colleagues catch a brutal killer. To discover the truth, Reuben must go undercover, and without back-up, into one of the country's most dangerous prisons.

Cut off from the outside world, and hunted by a psychopath, Rueben must stay alive so he can leave the prison and become a real father when his son needs him most.