Tom Strong, the title character, is a "science hero", with a wife, Dhalua, and a daughter, Tesla, both with enhanced physical and mental abilities and longevity. He lives in a building called The Stronghold in Millennium City. He is also helped by Pneuman, a steam-powered robot, and King Solomon, a gorilla with human characteristics. His greatest foe is tuxedo-clad "science villain" Paul Saveen.