In the beginning, everything seemed wonderful for the six friends: lessons at the Guide School, visits to archaeological sites, endless walks, discussions, and jokes. But when the kids suspect that their friend Makis is involved in an antiquities smuggling case, problems begin. And if that's really the case, what happens? Will they betray their friend? An adventurous novel, almost a detective story, full of action, in which the history of Thessaloniki unfolds in a simple way. [Excerpt from the text on the back cover of the edition]