At Isabella's thirteenth birthday celebration, her father announces he is beginning a new tradition-to write her a letter every year on her birthday until she turns twenty-one. The letters will chronicle her life while serving as a reminder that no matter what happens in life, God is always faithful.

Seven years have passed since Isabella last opened her memory box of letters. Now that she is celebrating twenty-eight years of life, it is time to open the box again. Life has not always been a smooth ride for Isabella, but despite the loss of her father, she has remained focused on her dreams. Now as she prepares to embark on a medical internship that will take her from Louisiana to Italy, she has no idea what awaits. As she re-reads her collection of birthday letters, Isabella revisits their messages in the most unexpected of ways. But will she accept the divine invitation to recapture her childlike faith and once again believe that the moon is being held by heavenly strings?

In this inspirational tale, a young woman revisits a collection of letters penned by her father as she enters a new chapter and searches for a way to reconnect with God and her faith.