Charlie (Robert Pattinson) first spotted Emma (Zendaya) at a coffee shop one fall afternoon and somehow worked up the nerve to say hello. What started out as a trainwreck ended with them exchanging numbers—which led to three hour phone calls about everything and nothing, lazy Sundays camped out in parks and bookstores, and late-night diner runs where Emma ordered burgers so rare they were practically mooing. Two years of laughing until their ribs hurt later, and they're ready to make it official, but the happy young couple's stability is put to the test when an unexpected turn of events sends their wedding week spiraling out of control.