Most teens dream of visiting the City of Lights, but it feels more like a nightmare for Sophie Brooks. She and her brother are sent to Paris to spend the summer with their father, who left home a year ago without any explanation. As if his sudden abandonment weren't betrayal enough, he's about to remarry, and they’re expected to play nice with his soon-to-be wife and stepdaughter. The stepdaughter, Camille, agrees to show them around the city, but she makes it clear that she will do everything in her power to make Sophie miserable.