After an overhaul of leadership at the FBI's New York field office, Special Agent A.X.L. Pendergast is forced to accept an unthinkable condition of continued employment: the unorthodox lone wolf must now work with a partner. Pendergast and his new cohort, Special Agent Coldmoon, are dispatched to Florida to investigate a rash of ritualistic murders. A killer is carving out the hearts of his victims, and depositing the stolen organs alongside the headstones of existing graves. Accompanying each heart is a cryptic letter, signed by a 'Mr Brokenhearts'. There is one more intriguing aspect to Mr Brokenhearts' macabre modus operandi: the chosen graves all belong to women who have committed suicide.