Lars of Mars was a law enforcement agent of the Supreme Council, the ruling body of Mars. When the Supreme Council learned that a hydrogen bomb was successfully tested on Earth, it became alarmed. The hydrogen bombs were used in a devastating war between Mars and Venus millions of years ago, and the Council was worried that humanity would start the war anew once it enters space. They decided to send Lars to Earths a peacekeeping agent who would stop any possibility to interstellar war by fighting against "forces of evil" that would seek the disrupt the peace.