The night before her twelfth birthday, Sadie hears bells jingling outside her window. When she looks out, there is nothing there. Are these bell sounds really coming to Sadie from the past, from a time when horses regularly traveled the old coach road? And why is there a mysterious scent of perfume in her room? Why do the ghostly figures of a man and a woman quarrelling appear there at night? The eerie messages Sadie is receiving soon involve her whole family in a treasure hunt that solves a mystery which began one hundred and fifty years ago.