No sooner does former magician's assistant Margo Tamblyn return home to Proper City, Nevada, to run Disguise DeLimit, her family's costume shop, than she gets her first big order. Wealthy nuisance Blitz Manners needs forty costumes for a detective-themed birthday bash. As for Blitz himself, his Sherlock Holmes is to die for--literally--when, in the middle of the festivities, Margo's friend and party planner Ebony Welles is caught brandishing a carving knife over a very dead Blitz. For Margo, clearing Ebony's name is anything but elementary, especially after Ebony flees town. Now Margo is left to play real-life detective in a town full of masked motives, cloaked secrets, and veiled vendettas.