A simple mistake, a surprising proposal, and her sensible life spirals out of control. It’s Allie’s fourth wedding this summer, while her own life is stuck in a holding pattern. Distracted, she walks into the wrong room—yeah, that room—and makes eye contact with a good-looking, if startled, man. After her hasty retreat, she spies a high-backed chair by the fireplace, perfect for hiding while she regains her composure. As she sinks down with a sigh, the matching chair beside hers swivels around to reveal Bathroom Door Guy. Theo gave up dreams of college to take over the guardianship of his ten-year-old brother. With his brother now grown, Theo takes stock of his life. Something’s missing. Then Allie walks into his life. After the initial moment of shock, something unexpected happens—they talk easily. That’s how Allie’s boyfriend, Justin, finds her—laughing and drinking champagne. After a quick introduction, Justin leads her back to the reception, where he drops to one knee and proposes. Time stops. Justin waits for an answer, but Allie can’t breathe. Someone whips out a phone and records it. Her answer goes viral. In the small coastal town of Pine Harbor, Allison’s life has just turned upside down.