A magical locket sends a young girl spiraling from present-day Sydney into 1850s Scotland to solve the mystery behind their family's migration to Australia 

Sophie discovers a golden locket in an old treasure box that belonged to her grandmother's grandmother. When she falls asleep wearing the locket, she magically travels back in time to 1858 to learn the truth about her ancestor, the mysterious Charlotte Mackenzie. Daughter of a wealthy Scottish laird, Charlotte and her sister Nell live a wonderful life with their parents and animals on a misty island with its very own ruined castle. Then disaster strikes and it seems the girls will lose everything they love. Why were Charlotte and Nell sent halfway around the world to live with strangers? Did their wicked uncle steal their inheritance? What happened to the priceless sapphire—the Star of Serendib? With the magic of the golden locket, Sophie begins to unravel these mysteries as she shares the adventures of Charlotte and Nell—outwitting their greedy relatives, escaping murderous bushrangers, and fighting storm and fire. But how will these travels in time affect Sophie's own life?