When 17-year-old Mia moves to a small coastal town, she finds a series of old love letters hidden in her new home’s attic. Partnering with local boy Alex, she uncovers a decades-old mystery involving Emily and James, a young couple separated by family disapproval and a tragic event. As Mia and Alex unravel the past, they not only reveal the story behind the letters but also discover profound truths about love, trust, and their own emerging relationship.