After the accident that put his sister in a deep coma, Flavien discovers a magical world under a hospital bed. A disturbing mist ravages the kingdom of this mysterious land, and a sleeping princess somewhere off in this distant universe could be the key to saving his sister.

The young boy, accompanied by a strange creature, embarks on an epic and dreamlike quest full of adventures and riddles to defeat Scarified, an evil being whose scars reflect the darkest nightmares, and to liberate the Kingdom of the Underworld, whose territories are divided between light, shadow, and twilight. Many trials await them, such as a visit to a haunted forest and a face-to-face encounter with two gigantic monsters who, like a Sphinx, impose riddles to guard the entrance of a sacred mausoleum.

Without knowing it, he will travel through some literary classics like Alice in Wonderland, The Neverending Story, and The Wizard of Oz.

For all these references are not accidental, and Flavien will discover at the end of his journey, during the final confrontation, that everything is linked to the books he has always loved.