The storied Hotel Chevalier on Paris's ritzy Right Bank hosts celebrities, dignitaries, and?for one night?Lana Gibson, an American woman who's escaped the monotony of her staid married life for a cultural jaunt to the City of Light. As long as she takes her meds, she promises herself, her heightened curiosity and manic elation will stay under control. But when that curiosity leads her to the hotel's private elevator, which serves only the ultra-elite penthouse Suite Imperial, she spies much more than plush carpets and gilt chandeliers: she sees a young woman in danger. Lana alerts the police, plunging herself into a firestorm of intrigue and becoming a target. Alone in the city, not knowing who has her best interests at heart, Lana will need to use every ounce of strength and guile as she races to discover the relationship between the truth and what she saw.