The timepiece experiment

When charlotte goes missing while on an assignment to protect what is only known as The Timepiece Experiment her fiancé will do anything to get her back. But after six years and no charlotte what hope for finding her is there?

Then she comes back. And she is not the same person. She is a women scorned. She has seen things that no one should witness. She has come back for revenge. And she is going to get it. She has no more love for her ex fiancé, instead a burning hatred. But the elusive Experiment is close. Closer than it has ever been to being complete. They only need one more thing. Charlotte. Who is the experiment.