Ben Lewis. Blackmailed by a dead man. Hunted by armed killers. All because of Gunter Markov, a gifted North Korean hacker. Someone who has posted encrypted secrets online - supposedly the hack to end all hacks.Deadly secrets. The sort many seem suddenly only too willing to kill for. Lewis finds himself unexpectedly the one person alive able to decrypt Markov's coded hack. As a nationwide manhunt is launched to find Lewis, his former girlfriend, Holly, goes missing, presumed kidnapped.Will Lewis be able to find Holly before it is too late? Or will others get to Lewis - and the encryption key - first? Especially those increasingly desperate to ensure that Markov's encrypted secrets remain buried forever.