Carlotta Carlyle, the six-foot-tall redhead private investigator, thought that working undercover searching out fraud on Boston's Big Dig would be a challenging assignment. After all, the Big Dig, the creation of a central artery highway through downtown Boston, is a USD 14 billion project, the largest urban construction undertaking in modern history. But playing a mild-mannered secretary working out of a construction trailer is not quite the thrill ride she had in mind, so Carlotta starts moonlighting, taking on a missing person case. The mysterious death of a construction worker stirs up a storm of events and soon enough Carlotta is in over her head, grasping at the edges of a vast conspiracy that threatens to make this investigation her last.