Mariana lives with her family on the Venetian island of Murano - famed for its artists who create masterpieces from glass. But when Mariana's little sister, Eliza, dies of consumption and her mother's heart seems as though it will never heal from the pain, Mariana's father decides to use his glassmaking skill - and a dash of magic - to create a girl of glass in Eliza's image.

The remarkable glass doll, who sings, dances and talks, draws attention wherever she goes, and soon Mariana is famous for having the magical glass sister. But as the glass girl takes on more and more of Eliza's personality, Mariana begins to suspect that there is more than just magic at play. Could the girl of glass be her sister's ghost made real?