17-year-old Katie is overwhelmed when she lands a job as a nanny for Premier League footballer Brett Ballentine and his wife Kassie's kids. Arriving at the Ballentine mansion in London, Katie feels as though she's living in OK magazine. Plus, she's got a whole floor of the house to herself, her own car, and the inside scoop on Britain's most notorious celebrity couple. But there is a downside. Katie has to learn to keep her mouth shut when it comes to some of Kassie's strange and desperate behaviour. And Brett is like the ice man - he barely acknowledges her. As time goes on the 'happy couple' reveal their true colours, and the true state of their volatile marriage. Kassie has a twisted secret, and Brett's getting too fond of 'playing away'. Katie feels like she and the kids are caught in the middle of a war zone, culminating in a shocking revelation about Brett. Katie knows that what she knows about the Ballentines could mean she never has to work again. But while Katie struggles with her predicament, a budding young photographer snaps the picture the tabloids have been waiting for and catapults herself into the limelight ...