When Gia Montgomery's boyfriend Bradley dumps her in the school parking lot right before prom, she panics — she's spent months telling her friends about him, and tonight was supposed to prove he was real. Spotting a cute stranger waiting to pick up his sister, she talks him into being her fill-in boyfriend for two hours, zero commitment, a few white lies. Days later, it's the stand-in she can't stop thinking about, and their fake relationship keeps finding new reasons to continue — until Bradley reappears, threatening to expose her lie and unravel everything she's built.