The orphans who are part of the Academy, led by the young Sofia Hypatia with a revolutionary way of thinking based on philosophy, are looking for new clues to find the most wanted criminal. After the supposedly accidental death of an employee of an important factory, the detective agency FILO&SOFIA, inspired by Karl Marx's commitment to social justice, will investigate the disappearance of several employees and their working conditions. (taken from the general page of the Salve publishing house)