Clancy (Charles Murray) is a pugnacious Irish-American plumber in partnership with parsimonious Scotsman Andy MacIntosh (Lucien Littlefield). Though tight with a dollar himself, Clancy accidentally begins playing the stock market, and before he knows what's happening he's become a millionaire. His efforts to entertain the cream of high society are both disastrous and hilarious, and by the time he's lost all his money in the Wall Street crash, Clancy is more than happy to team up with MacIntosh again. The obligatory romantic subplot is handled as unobtrusively as possible by Miriam Seeger and Edward Nugent. Clancy in Wall Street represented little more than an extension of Charlie Murray's standard Hibernian characterizations in the "Cohens and Kellys" series.