Growing up poor but proud on the Dorset coast, Mary follows after her father, hunting for fossils of ancient creatures. Ignoring other's taunts, Mary faces danger to bring back valuable treasures to help feed her family. But tragedy and despair are never far away. Mary must depend upon her unique courage and knowledge to fulfil her dream of becoming a scientist, in a time when girls have no opportunities for such ambitions. What will happen when she makes her greatest discovery of all?