Silver Trevelon's parents aren't happy. They haven't been happy since the nursery they decorated started gathering cobwebs, waiting for the baby brother or sister that never came. So when Silver's dad is invited to paint at a turtle rescue centre in Costa Rica, she hopes it'll be just the adventure the family needs. Under the hot tropical sun, Silver settles into life at the animal centre. She even witnesses a rare sighting of a leatherback turtle nesting on the beach. But when the turtle's eggs are stolen, events take a dark and dangerous turn. Can Silver and her new friends track them down before it's too late?