Lis is part of the Testa dynasty, great inventors in the world. But at her age she has not yet made her debut as inventor, and she knows that time is running out. She will soon discover the secret hiding among the few inventor ladies in the history ...

Lis is part of the Testa dynasty, great inventors in the world. But at her age she has not yet made her debut as inventor, and she knows that time is running out. She will soon discover the secret hiding among the few inventor ladies in the history of the Testa dynasty, and will be immersed in a very complicated mission to unmask her own family.