If you seek revenge, dig two graves.'

Undercover cop John 'Mac' MacDonagh has been living a double life, infiltrating the network of Reuben Volk, one of London's deadliest criminals. But the brief definitely didn't include falling in love with a member of Volk's gang: the beautiful and enigmatic Elena Romanov.

Now Elena has been murdered. Waking in his hotel to discover her battered body in the next room, Mac is left with no clue as to who killed her - or why. In fact, all the evidence suggests that it was Mac who killed her, but he can't believe that. Or can he?

With the police on his tail he enters into a race against time. All he knows is that something is happening at 11pm, something that could help him to uncover the truth.

Was Mac framed? Or does he really have a dead woman's blood on his hands?