What is Jasmine's Heart?There's a haunted shipwreck off Whale Island and a rare diamond was lost when the ship sank. When the Thea Sisters' biology professor disappears, the mice have to dive deep into the ocean to find him - and hopefully recover the priceless jewel! And just when they think their adventures are over, the five mice are invited to China to search for another lost treasure!Meet the Thea Sisters!Nicky is always in a good mood when she's outdoors.Colette is energetic and full of great ideas.Pamela is a peacemaker who can't stand arguments.Paulina loves travelling and helping other rodents.Violet is detail-oriented and always open to new things.