Danni Sanders (Zoey Deutch), an aimless aspiring writer with no friends, no romantic prospects and — worst of all — no followers, fakes an Instagram-friendly trip to Paris in the hopes of boosting her social media clout. When a terrifying incident strikes the City of Lights, Danni unwittingly falls into a lie bigger than she ever imagined. She "returns" a hero, scooping up the man of her dreams Colin (Dylan O'Brien), and even striking up an unlikely friendship with Rowan (Mia Isaac), a real trauma survivor dedicated to societal change. As an influencer and advocate, Danni finally has the life and audience she always wanted. But it’s only a matter of time before the facade cracks, and she learns the hard way that the Internet loves a takedown.