5 years ago, Jacob, your boyfriend, migrate into a different country. In order to communicate, the two of you starts to send letters to each other. However, after a year you didn't received any letter. You kept sending him letters, until you started to give up. You thought he stopped communicating with you because your relationship is done. Turns out, your mother kept your letters and Jacob's letters that he sent. You only discovered it 5 years later after your mother's death.