A private operative, Abby Sinclair stalks the stalkers and takes them down. Her newest client is a congressman shadowed by a mystery woman believed to be a disgruntled ex-employee. He wants her stopped. What Abby doesn't know is that the FBI special agent Tess McCallum is already on the case--and back in her life--partnered with her in a deadly new game after the two vowed never to work together again.