Novel. Definitely.

Through a miscommunication, Danni moved in with Alex after a year in the city. They developed a close relationship and fell in love, but Danni never talked about her past. While Alex didn't push it, he was curious and started to snoop, finding strange pieces here and there of a girl named Michelle. When he tried to look her up, she seemed to not exist.

Hesitant to ask her about it, he quickly finds he doesn't need to as the past has a way of catching up with her and Danni's haunting past has come back to try and eliminate her.

Danni - The woman with a mysterious past, but is otherwise a happy and easy going woman.
Alex - The man with that urge for adventure and something more exciting in life than his dull job.

It's the regular world. Either in New York or Vancouver, not sure which.

I watched too much College Humour one day. After that, I kind of wanted to check out a show in New York, then thought about the worst that could happen if I did so.

Look up the witness protection program. A lot.