The "urban" nature of the title notwithstanding, Gangster's Den is another PRC Studios B-western. Buster Crabbe and Al St. John, as usual, fill the roles of cowboys Billy Carson and Fuzzy Q. Jones. This time, Billy and Fuzzy are partners in a gold mine. Using his earnings, Fuzzy opens a saloon, which unfortunately turns into a safe harbor for every thief and varmint within shouting distance. Billy comes to Fuzzy's rescue, dispersing the crooks and bringing the worst of the bunch to justice.