It always starts out as routine, even when you are only doing it while your husband is deployed at sea.
Even if it began as a safe, easy way to make enough cash to start a family. Even if there was no way you would ever get stuck doing it full time. After all, that's why you retired from the FBI. 
But then they killed off your prime witnesses all over the globe, erased all their digital fingerprints from a Wall Street hedge fund, blew up your office, tried to blow up St. Pats, and, with unlimited funding from financial plays in the stock market, launched the biggest, most devastating attack ever directed against a city. One that no one saw coming. An unthinkable event that would have ramifications for the next 100 years, or more. 
And all you wanted to do was go home to Hawaii and coach high school soccer... Welcome to former FBI agent Brooke Burrell's life. Her cushy assignment turns into a countdown to mega-death and destruction, keeping her and her hand-picked group of experts guessing what, where, and when the attack will be - right up until zero hour.