A spiritualist girl foresees the death of a wealthy widow who, shortly after, dies at the hands of a ghost, so she begins to investigate the crime to save herself from jail.
This title has two teenagers as protagonists: Sara, a spiritualist with great scientific knowledge, and Dolores, an intelligent and tough girl who knows the miserable reality of a city in full industrialization. Together with the help of the Foundlings and despite the opposition of Inspector Estrada, the two girls will manage to solve the Crime of the Spectre.