Twelve-year-old Flora Winter and her mother are off to the small seaside town of Helmersbruk for Christmas. When they arrive, Flora soon discovers an abandoned mansion straight out of a fairytale. But it's not just the manor that's mysterious - porcelain figures are appearing out of nowhere, a strange boy in a green cap seeks her friendship, and she hears eerie whispers in the night. Flora is determined to unravel the secrets of Helmersbruk Manor - but as the clock ticks down to Christmas, Flora must solve the mystery before time runs out.