The storied Hotel Chevalier on Paris' ritzy Right Bank hosts celebrities, dignitaries, and, for one hour, Lana Gibson, an American woman who's escaped the monotony of her staid married life for a cultural jaunt to the City of Light. 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: a young woman caught in the clutches of a threatening-looking older man. Unable to erase the image of the girl in danger from her mind, Lana alerts the police, plunging herself into a firestorm of intrigue and becoming a target.