Southside 1-1000 has to work hard to wash out the sour taste left by its obligatory, patriotic opening: Stock battle footage runs under a voice-over linking the importance of a sound national currency to the Korean conflict (then playing at a theater of war near you) and the diabolical, all-encompassing threat of Communist domination. Whew! (It was the early cold-war era, and viewers were all but required to swear a loyalty oath before they could enjoy even a B-programmer.) Unluckily, it doesn't work hard enough.

Locked up in a federal pen, a top-notch forger pores over his Bible until lights out, when he whisks out his engraving tools and etches the plates for `queer.' Smuggled out, they go on the presses turning out counterfeit bills to be uttered at race tracks and Vegas poker parlors. G-Man Don DeFore (an avuncular figure familiar from television - Ozzie and Harriet, Hazel) goes undercover to track down and infiltrate the source of the funny money. Middleman Barry Kelley goes down (literally, through a window) but the brains of the operation stay at large. Then, as a big-spending good-time Charley, DeFore catches the eye of Andrea King, daughter of the old jailbird. But his cover is blown at his moment of greatest peril....