Sixteen-year-old Dayana has always dreamed of visiting London — to walk along the Thames, take pictures outside Buckingham Palace, and maybe even get a glimpse of Arthur, Prince of Wales, whose marriage has been all over tabloids. But the trip of her dreams turns into a royal nightmare when her mother passes away. Now, Day must leave Rio de Janeiro to live with her estranged father and his new family in London.

As it turns out, the U.K. isn't exactly Day's cup of tea. She struggles to forgive her father for walking out on her and her mom all those years ago; fights with her stepsister constantly; detests her stepmother; and she can't even see One Direction in concert because they've been broken up for ages. All she wants to do is trade the rainy skies of London for the sun and beaches of Rio.

That's when she runs into the girl of her dreams — literally: The coincidentally named Diana, a witty, funny, redhead who was in the middle of . . . escaping Buckingham Palace? Something isn't right here, but it makes Diana all the more alluring. As time passes, and the two girls grow closer, Day can't help but wonder if there is more than a little truth to the rumors surrounding Prince Arthur — and if Diana might be involved somehow. Is it all in her head, or could Day be caught up in a real-life royal scandal?