Tico is a particular guy. Or at least that's what everyone thinks in his school, except his best friend Tiago. One day something happens, something particular even for Tico: Alejo, one of the students of the last year is fighting at recess with Matías. In the confusion of the fight, Matías receives a blow that ... leaves him unconscious on the ground! And to make matters worse, Miss Elba's students have disappeared. But do not despair, reader, because it will come to the rescue ... El Capitán Flúo!