After her father's death, Sierra stumbles upon a collection of old letters hidden in his office, all signed by someone named "D" and addressed to a mysterious woman named Sophia. The words are filled with love, longing, and something darker - as if a secret lingers between the lines. Determined to uncover who these people were and why her father kept the letters hidden, Sierra embarks on an emotional journey. With each letter she reads, fragments of a story emerge - one that feels like both a promise of eternal love and an unresolved mystery. As D and Sophia's words pull her deeper into their world, Sierra begins to question how well she really knew her father - and whether the ghosts of a lost love might somehow alter the course of her own life. Secrets. Unfinished love. And a truth waiting to be discovered between the ink-stained pages of two lives intertwined by time.