Grace, a young woman from Texas, finally embarks on her dream trip to Paris with her best friend Emma and stepsister Meg. Their budget vacation goes awry when they find themselves hustled through a hectic tour. Stranded and disappointed, their fortunes change when Grace is mistaken for a wealthy British heiress named Cordelia Winthrop-Scott. Seizing the opportunity, the trio adopts a luxurious lifestyle, enjoying a lavish stay at a five-star hotel.

As they immerse themselves in this new world, they experience high-society events and mingle with the elite, all while maintaining the facade that Grace is Cordelia. However, the ruse becomes increasingly complicated. Along the way, secrets are revealed, relationships are tested, and the trio is forced to confront their identities and dreams.