Exciting magical adventure series – will you answer the call of the Silver Dolphins? Antonia is a secret Silver Dolphin – she's responsible for helping the creatures of the bay when their environment is threatened, by responding to the call of her magic necklace. A colony of puffins is endangered by a building development and baby birds are constantly under threat from the diggers. Can Antonia and Cai protect the pufflings and their cliff top home?