Heather Harris is a piano teacher and professional musician, whose quiet life revolves around music, whose memories centre on a single song that haunts her. A song she longs to perform again. A song she wrote as a child, to drown out the violence in their home. A song she played with her little sister, Harriet. But Harriet is gone. . .she disappeared when their parents died, and Heather never saw her again. When Heather is offered an opportunity to play piano on a cruise ship, she leaps at the chance. She'll read her recently released childhood care records by day - searching for clues to her sister's disappearance - and play piano by night. . .coming to terms with the truth about a past she's done everything to forget.