When Amy Wild goes to live at her great-aunt's tea room on the island of Clamerkin, Granty, her great aunt, welcomes her with a very special necklace - a necklace that gives Amy the power to talk to animals. Granty's terrier, Hilton, introduces Amy to the Clan - a group of animals whose job is to protect the island.
Amy Wild's first day at her new school is disrupted by the appearance of an uninvited guest, when Mozart the music-loving mouse joins in the children's singing lesson. The head master is not impressed and threatens to get rid of Amy's friend, Einstein the school cat, if Einstein does not get rid of the mouse.