Jenna has planned her wedding according to the wishes of her late mother, who left behind The Notebook: specific instructions for every detail of her youngest daughter's future nuptials. Everything should be falling into place for the beautiful Nantucket wedding that will unite the Carmichael and Graham families -- but instead, things are falling apart. If only Jenna's mother had left directions for what to do about divorce, affairs, and other matters of the heart. While the nearly newlyweds seem appropriately blissful, their loved ones have arrived on the island with their own lives in disarray. Add some misbehaving bridesmaids, errant groomsmen, and the threat of rain, and the perfect weekend might instead turn into the perfect storm.