Every house hides its secrets… And Mortina knows it well, as she discovered in the library of the Dilapidated Mansion a secret passage leading to a door… with a strange lock.

To find out what lies behind it, Mortina sets off with her cousin Dilbert and her faithful dog Myth, on a journey full of surprises and twists.

Because behind that door hides the answer to the biggest question of all: Why is her family... zombies?

A new adventure of the zombie girl who makes the whole world die... laughing!