Six weeks before her wedding, Peggy Moore learns that her parents created an Anniversary Box. Each year on their anniversary, they would write a message to each other to affirm their love and suggest ways to make it stronger, and they succeeded in living a married life that was the envy of their friends and family. When Peggy and her soon-to-be husband, Michael, find they are struggling with relationship issues as their wedding day draws near, Peggy sets out on a journey to find her parents’ missing Anniversary Box and learn the secret to keeping love alive for a lifetime before she steps to the altar herself.