Marine biologist Hana Ishikawa is racing against time to save the coral of the Great Barrier Reef, but struggles to fight for a future in a world where so much has already been lost.Seventeen-year-old Judith Holliman escapes the monotony of Sydney Town during the nineteenth century, when her naval captain father lets her accompany him on a voyage, unaware of the wonders and dangers she will soon encounter.Telma Velasco is hunting for a miracle in a world ravaged by global heating: a leafy seadragon, long believed extinct, has been sighted. But as Telma investigates, she finds hope in unexpected places.