It's the end of summer, 2001. Erin O'Connor has everything she's ever dreamed of: good friends, a high-powered career at a boutique Manhattan firm, and a husband she adores. They have plans for their life together: careers, children, and maybe even a house in the country. But life has other plans. Daniel works on the 101st floor of the World Trade Center.
Erin is drinking margaritas on a beach in Mallorca, helping her best friend get over a breakup, when she hears a plane has crashed into Daniel's building. On a television at the smoky hotel bar, she watches his building collapse. She makes her way home with the help of a stranger named Alec, and once there, she haunts Ground Zero, nearby hospitals, and trauma centers, plastering walls and fences with missing-person flyers. But there's no trace of Daniel.
After accepting Daniel's death, Erin struggles to get her life back on track but makes a series of bad decisions and begins to live her life in a self-destructive fog of booze and pills. It's not until she hits rock bottom that she realizes it's up to her to decide: Was her destiny sealed with Daniel's? Or is there life after happily ever after?