When ten-year-old orphan Peter Augustus Duchene encounters a fortune teller in the marketplace one day and she tells him that his sister, who is presumed dead, is in fact alive, he embarks on a remarkable series of adventures as he desperately tries to find her.

Best friends Annabelle and Tiffany risk placing all of dollkind in danger when they run away while trying to prevent Tilly from being sent back to London before they can determine if she is Annabelle's long-lost baby sister.

Visiting her grandmother in Australia, Livy, ten, is reminded of the promise she made five years before to Bob, a strange, green creature who cannot recall who or what he is.