Claire DeWitt is not your average private investigator. She has brilliant skills of deduction and is an ace at discovering evidence. But Claire also uses her dreams, omens, and mind-expanding herbs to help her solve mysteries, and relies on Détection—the only book published by the great and mysterious French detective Jacques Silette before his death.

The tattooed, pot-smoking Claire has just arrived in post-Katrina New Orleans, the city she’s avoided since her mentor, Silette’s student Constance Darling, was murdered there. Claire is investigating the disappearance of Vic Willing, a prosecutor known for winning convictions in a homicide-plagued city. Has an angry criminal enacted revenge on Vic? Or did he use the storm as means to disappear? Claire follows the clues, finding old friends and making new enemies—foremost among them Andray Fairview, a young gang member who just might hold the key to the mystery.