Liam found a letter that had not been sent yet while sorting through his mother's belongings. The content of the letter led to a hidden past that had been hidden for many years. Photographer Sophia accompanied him in searching for clues, and the two gradually pieced together the truth of the past through old photos, keys, and notebooks. In the process of pursuing memories, they re-understood the concerns and regrets between family members, and also discovered that a delayed letter may be able to change a family's story. While sorting through his late mother's belongings, Liam discovers a letter that was never sent. Its contents lead him to a chapter of the past that has been hidden for years. Sophia, a photographer, joins him in his search for clues. Together, they gradually piece together the truth through old photographs, a key, and a notebook. As they retrace the memories of the past, they come to see their family's enduring love and lingering regrets in a new light. They also discover that a long-overdue letter may have the power to rewrite one family's story.
