David Hansen was a big-shot lawyer who grew tired of his important and expensive Los Angeles law firm. Hansen left his job to start a non-profit firm called Neighborhood Legal Services based in Century City, California. His associates were Deborah Sullivan and Gabriel Kay. Roberto was a law student who worked for them as a clerk. After 13 episodes, the show's format was changed, as Hansen, Sullivan and Kay went to work for Devlin McNeil at the firm which Hansen had quit in the first place.
The theme song was written by Morton Stevens, who also wrote the theme for Hawaii 5-0. The Ventures had had a top 5 hit with the Hawaii 5-0 theme, but their version of the Storefront Lawyers, released as a single in late 1970, failed to become a hit.