The Distance — Helen Giltrow

Charlotte Alton is an elegant London socialite. But behind the locked doors of her sleek, fortified apartment, she becomes Karla, a fixer who specializes in creating and erasing identities, and can cover any criminal's tracks. Only a few people in the world know her secret.

One of them is Simon Johanssen, a killer-for-hire who resurfaces -- years after she helped him to quietly disappear -- with an impossible job. He needs access to a high-security, experimental prison colony in order to assassinate an inmate. The catch: there's no record of the target's existence, and what's worse, the criminal boss from whom he's been hiding is inside, too. The trap has been set, but who is the real target -- Johanssen or Karla herself?