It's 1931 and having dealt with Al Capone's diamond smuggling operation in the Belgian Congo Tintin and Snowy head for Chicago to clean up Gangsterland. He almost at once runs afoul of Al Capone himself but manages to evade the mob boss only to find himself making an enemy of Capone's rival Bobby Smiles. For many years Tintin in America was the earliest adventure available in English and it shows. Aside from Tintin and Snowy there are no other familiar characters, the plot (and research) is near nonexistant, and Snowy still talks (admittedly only on one page).