The crime scene at St. Marguerite's cathedral in New Orleans is shocking, even to seasoned detectives like Rick Bentz and Reuben Montoya. A novice nun named Sister Camille has been found dressed in a yellowed bridal gown and viciously garroted, her body covered with an altar cloth. Convinced the police aren't doing enough, Camille's sister, Valerie Houston, begins to investigate. But the deeper Val's inquiries go, the more twisted the case becomes. St. Marguerite's is far from the tranquil retreat many believe, and everyone, from handsome Father Frank O'Toole to the mysterious Mother Superior, has their own agenda. Despite their closeness, even Camille had a hidden life Val never suspected. But someone knew about Camille's past and Val's, too. Now she has no choice but to catch a devious, depraved killer intent on purging St. Marguerite's of all its sins before she becomes the next victim.