After the death of her mother, fourteen-year-old Sienna Fitch moves to a crumbling cottage on the Cornish coast. Struggling with grief, she discovers her mother’s diary and is drawn into a decades-old mystery involving smuggling, murder, and long-buried secrets within the local community.

As Sienna investigates, she uncovers a dangerous conspiracy tied to the village’s most powerful family. Guided by a mysterious presence and navigating windswept cliffs, hidden coves, and old tunnels, she risks her own safety and that of those she loves. To uncover the truth and bring justice to the past, Sienna must embrace her family’s legacy of courage and find the strength to face what others want kept hidden.

This atmospheric young adult mystery blends suspense, emotional depth, and gentle supernatural elements. With a strong female protagonist, themes of grief, resilience, and moral courage, and a vividly realised coastal setting, it will appeal to readers who enjoy character-driven mysteries with a sense of place.