Mortina and the secret chamber

Every house hides secrets. No one knows this better than Mortina, who discovers a secret passage in the library of Villa Decapente leading to a door with a very peculiar lock. To uncover what lies behind it, Mortina sets off with her cousin Dilbert and her greyhound Sorrow on a journey full of surprises and twists. Behind those doors, she finds the answer to the only question that truly matters: why is her family a family of monsters?