Matilda loves science and inventing. Her heroes are Marie Curie, Leonardo da Vinci and Thomas Edison, and one day she wants to be a famous inventor herself. So when she doesn’t win the school science fair, she’s devastated – especially as the judges didn’t believe she'd come up with her entry on her

own. Because she's a girl. When Matilda shares her woes with her Grandma Joss, she's astonished to learn her grandma was once a scientist herself.

Trouble is, Grandma Joss was also overlooked – her boss, Professor Smocks,

stole her discovery for himself. And he's about to be presented with a Nobel Prize.

Matilda concocts a plan...