Dr Jenna Ramey's newest case is a nightmare on a whole new scale, and it will find her BAU team (Behavioural Analysis Unit, an FBI Department) running point for a type of investigation they're almost never brought into, much less asked to lead. A band of ruthless assassins converges on a bank in Washington, D.C. They slaughter everyone inside and all escape without stealing a dime and leaving only a message for police warning that another attack is coming. The attackers are more than willing to communicate who they are and what they want. The problem is, they only do so through cryptic messages hidden in a labyrinth of classic literature references. With the clock ticking down the hours and minutes until another bloodbath, Jenna and the rest of the BAU team have a challenge profiling not one or two, but a dozen individual killers. But even if she is able to save the day, two enemies from her past are lurking right in her blind spot, ready to take advantage of her current preoccupation . . .