Actress and psychologist Antonia Giesen decides to film a script revealed by a voice within the mind of one of her patients. Seeking collaboration with the filmmaking duo León & Cociña, they craft a crossroads of theatre, science fiction, animation and fabulated biopic, populated by parallel worlds and haunted by the shadow of a Chilean Nazi writer as a demonic figure.
A crime has occurred in room 4B! A classmate has had a priceless and precious toy stolen: the Scarlet Tamagotchi. So Iñaki and his turtle friend Cecilio transform themselves into 1940s private detectives to solve the mystery. However, they will have to face dark forces that will not make their task easy.