Katelyn is living with her adopted family somewhere in a small town and she's dating BTR's Kendall! They met on their birthdays. There's one thing about Katelyn is she has been wearing a charm bracelet with her name on it when she comes back home after celebrating her sweet 16th Birthday. She needs to find out answers. the question is where did she come from ? Who is she ? Back in England, they are trying to find their young lost princess. One day famous Brirish Royal Young Couple Prince William and Kate Middleton come to this small town to find the lost princess of England. Little did they know Katelyn is the lost princess of England ! Prince Will told Kendall, Niall as well as the BTR members about Katelyn's past. When she comes down the stairs she realized she's the lost princess after all these 16 years ! At first, she couldn't believe it but after Niall told her about her past. She has to go back to England to descend the throne. She has some decisions to make leave her beloved small town and her boyfriend or descend the throne of England? And what are the qualities in a true Princess ?