They've been hired to think the UNTHINKABLE. But what happens when the unthinkable actually happens? After 9-11, best-selling author Alan Ripley joins a government think tank consisting of the most imaginative minds in diverse fields. Their job? Think of nightmare scenarios and crippling terrorist attacks so the government can safeguard against them. But when members of the think tank start to disappear one by one, can Alan stop the UNTHINKABLE from coming to pass?