Lisa left Derek at the alter seven years before the day the movie follows. Derek has never healed from Lisa's decision to leave him at the alter. Despite his pain, Derek is three years into a marriage to Kim, but their marriage is in crisis due to their inability to have a child.
Derek serendipitously runs into Lisa at a book signing and she invites him to sit down and talk. Lisa apologizes for leaving him at the alter without providing details. This film uses flashbacks and the other characters to build the story. The viewers remain one step ahead of Derek as it pertains to why Lisa left him, but not enough to figure out the entire plot. Each character knows more than he or she has revealed to Derek until the movie reaches a pleasant conclusion. Watch this film if you love romance, suspense, and drama.