today he oversees the production of wine in san patrignano.ow he is clean and learning how to find his way into a more ordered lifestyle. some 1300 former drug users live on the estate. where would claudio be without this opportunity? >> honestly, in prison or dead and buried. reporter: he is not allowed to drink it. drugs and red wine are strictly forbidden. >> just its bouquet. we learning to smell the bouquet of the wine. reporter: the san patrignano is surrounded by a high fence. it has vineyards, a cattle farm, a cheese dairy, and a bakery. that is where they make traditional cake with candied fruits. all the estate's residents have to learn a trade. there is no pay, but it's a first-class ticket back to life. 70% of san patrignano's graduates stay off drugs. this exceptional success rate is not the only reason it is famed far beyond italy's borders. >> this is a product that is totally homemade. with natural yeast and high-quality ingredients. the candied fruits are made here and they are certified organic. sicilian orange and lemon. rep